java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig07.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:14:30,443 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:14:30,445 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:14:30,458 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:14:30,458 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:14:30,459 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:14:30,460 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:14:30,468 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:14:30,469 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:14:30,470 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:14:30,471 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:14:30,471 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:14:30,472 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:14:30,473 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:14:30,474 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:14:30,475 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:14:30,477 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:14:30,481 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:14:30,492 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:14:30,493 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:14:30,494 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:14:30,497 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:14:30,497 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:14:30,497 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:14:30,498 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:14:30,499 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:14:30,500 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:14:30,500 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:14:30,508 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:14:30,509 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:14:30,509 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:14:30,510 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:14:30,510 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:14:30,511 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:14:30,511 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:14:30,512 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:14:30,541 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:14:30,542 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:14:30,542 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:14:30,542 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:14:30,543 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:14:30,543 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:14:30,544 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:14:30,544 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:14:30,544 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:14:30,544 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:14:30,544 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:14:30,545 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:14:30,545 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:14:30,545 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:14:30,545 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:14:30,545 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:14:30,545 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:14:30,547 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:14:30,547 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:14:30,599 INFO ]: Repository-Root is: /tmp [2018-06-22 05:14:30,613 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:14:30,617 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:14:30,618 INFO ]: Initializing SmtParser... [2018-06-22 05:14:30,619 INFO ]: SmtParser initialized [2018-06-22 05:14:30,619 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig07.c.smt2 [2018-06-22 05:14:30,620 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 05:14:30,721 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig07.c.smt2 unknown [2018-06-22 05:14:30,978 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig07.c.smt2 [2018-06-22 05:14:30,985 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:14:30,990 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:14:30,991 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:14:30,991 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:14:30,991 INFO ]: ChcToBoogie initialized [2018-06-22 05:14:30,998 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:14:30" (1/1) ... [2018-06-22 05:14:31,051 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:14:31 Unit [2018-06-22 05:14:31,051 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:14:31,052 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:14:31,052 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:14:31,052 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:14:31,074 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:14:31" (1/1) ... [2018-06-22 05:14:31,075 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:14:31" (1/1) ... [2018-06-22 05:14:31,081 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:14:31" (1/1) ... [2018-06-22 05:14:31,081 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:14:31" (1/1) ... [2018-06-22 05:14:31,085 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:14:31" (1/1) ... [2018-06-22 05:14:31,087 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:14:31" (1/1) ... [2018-06-22 05:14:31,096 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:14:31" (1/1) ... [2018-06-22 05:14:31,097 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:14:31,098 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:14:31,098 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:14:31,098 INFO ]: RCFGBuilder initialized [2018-06-22 05:14:31,099 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:14:31" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:14:31,117 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:14:31,117 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:14:31,117 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:14:31,117 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:14:31,117 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:14:31,117 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:14:31,261 INFO ]: Using library mode [2018-06-22 05:14:31,266 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:14:31 BoogieIcfgContainer [2018-06-22 05:14:31,266 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:14:31,268 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:14:31,268 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:14:31,279 INFO ]: TraceAbstraction initialized [2018-06-22 05:14:31,279 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:14:30" (1/3) ... [2018-06-22 05:14:31,280 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f546829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:14:31, skipping insertion in model container [2018-06-22 05:14:31,280 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:14:31" (2/3) ... [2018-06-22 05:14:31,281 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f546829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:14:31, skipping insertion in model container [2018-06-22 05:14:31,281 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:14:31" (3/3) ... [2018-06-22 05:14:31,283 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:14:31,301 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:14:31,320 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:14:31,372 INFO ]: Using default assertion order modulation [2018-06-22 05:14:31,373 INFO ]: Interprodecural is true [2018-06-22 05:14:31,373 INFO ]: Hoare is false [2018-06-22 05:14:31,373 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:14:31,373 INFO ]: Backedges is TWOTRACK [2018-06-22 05:14:31,373 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:14:31,373 INFO ]: Difference is false [2018-06-22 05:14:31,373 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:14:31,373 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:14:31,387 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:14:31,399 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:14:31,399 INFO ]: Found error trace [2018-06-22 05:14:31,400 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:14:31,400 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:14:31,405 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 05:14:31,407 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:14:31,407 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:14:31,440 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:14:31,440 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:14:31,440 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:14:31,474 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:14:31,545 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:14:31,548 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:14:31,548 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:14:31,549 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:14:31,560 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:14:31,560 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:14:31,562 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:14:31,606 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:14:31,606 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:14:31,607 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:14:31,608 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:14:31,608 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:14:31,615 INFO ]: With dead ends: 9 [2018-06-22 05:14:31,615 INFO ]: Without dead ends: 9 [2018-06-22 05:14:31,617 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:14:31,632 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:14:31,646 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:14:31,647 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:14:31,648 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:14:31,649 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:14:31,649 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:14:31,649 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:14:31,649 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:14:31,649 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:14:31,649 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:14:31,649 INFO ]: Found error trace [2018-06-22 05:14:31,649 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:14:31,649 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:14:31,649 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 05:14:31,650 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:14:31,650 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:14:31,650 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:14:31,650 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:14:31,650 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:14:31,670 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:14:31,795 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:14:31,795 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:14:31,795 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:14:31,804 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:14:31,841 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:14:31,848 INFO ]: Computing forward predicates... [2018-06-22 05:14:32,174 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:14:32,206 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:14:32,206 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:14:32,207 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:14:32,207 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:14:32,207 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:14:32,207 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:14:32,276 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:14:32,276 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:14:32,276 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:14:32,276 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:14:32,276 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:14:32,277 INFO ]: With dead ends: 11 [2018-06-22 05:14:32,277 INFO ]: Without dead ends: 11 [2018-06-22 05:14:32,278 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:14:32,278 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:14:32,279 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:14:32,279 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:14:32,280 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:14:32,280 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 05:14:32,280 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:14:32,280 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:14:32,280 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:14:32,280 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:14:32,280 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:14:32,280 INFO ]: Found error trace [2018-06-22 05:14:32,280 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:14:32,281 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:14:32,281 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-22 05:14:32,281 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:14:32,281 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:14:32,284 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:14:32,284 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:14:32,284 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:14:32,353 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:14:32,724 WARN ]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 05:14:32,772 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:14:32,772 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:14:32,772 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 05:14:32,778 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:14:32,822 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:14:32,822 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:14:32,825 INFO ]: Computing forward predicates... [2018-06-22 05:14:35,894 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:14:35,916 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:14:35,916 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:14:35,917 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:14:35,917 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:14:35,917 INFO ]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:14:35,917 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:14:36,064 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:14:36,064 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:14:36,064 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:14:36,064 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:14:36,064 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:14:36,065 INFO ]: With dead ends: 12 [2018-06-22 05:14:36,065 INFO ]: Without dead ends: 12 [2018-06-22 05:14:36,065 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:14:36,065 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:14:36,067 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:14:36,067 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:14:36,067 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:14:36,067 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:14:36,067 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:14:36,067 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:14:36,067 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:14:36,067 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:14:36,068 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:14:36,068 INFO ]: Found error trace [2018-06-22 05:14:36,068 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:14:36,068 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:14:36,068 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-22 05:14:36,068 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:14:36,068 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:14:36,069 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:14:36,069 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:14:36,069 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:14:36,115 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:14:36,341 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:14:36,341 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:14:36,341 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:14:36,350 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:14:36,383 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:14:36,383 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:14:36,386 INFO ]: Computing forward predicates... [2018-06-22 05:14:36,982 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:14:36,997 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:14:37,007 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:14:42,755 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:14:42,781 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:14:42,781 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-06-22 05:14:42,781 INFO ]: Interpolant automaton has 10 states [2018-06-22 05:14:42,781 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 05:14:42,781 INFO ]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:14:42,781 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 10 states. [2018-06-22 05:14:43,064 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:14:43,064 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:14:43,064 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:14:43,065 INFO ]: Start accepts. Automaton has 10 states. Word has length 11 [2018-06-22 05:14:43,065 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:14:43,065 INFO ]: With dead ends: 13 [2018-06-22 05:14:43,065 INFO ]: Without dead ends: 13 [2018-06-22 05:14:43,066 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:14:43,066 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:14:43,067 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:14:43,067 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:14:43,067 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:14:43,067 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:14:43,067 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:14:43,067 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:14:43,067 INFO ]: Interpolant automaton has 10 states. [2018-06-22 05:14:43,067 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:14:43,068 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:14:43,068 INFO ]: Found error trace [2018-06-22 05:14:43,068 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:14:43,068 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:14:43,068 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 4 times [2018-06-22 05:14:43,068 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:14:43,068 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:14:43,069 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:14:43,069 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:14:43,069 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:14:43,183 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:14:43,768 WARN ]: Spent 318.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2018-06-22 05:14:43,888 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2018-06-22 05:14:43,917 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:14:43,918 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:14:43,918 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:14:43,927 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:14:43,968 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:14:43,968 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:14:43,971 INFO ]: Computing forward predicates... [2018-06-22 05:14:44,752 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:14:44,764 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:14:44,778 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:14:55,540 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:14:55,560 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:14:55,560 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 05:14:55,561 INFO ]: Interpolant automaton has 11 states [2018-06-22 05:14:55,561 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 05:14:55,561 INFO ]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:14:55,561 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 11 states. [2018-06-22 05:14:55,903 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:14:55,903 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:14:55,903 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:14:55,904 INFO ]: Start accepts. Automaton has 11 states. Word has length 12 [2018-06-22 05:14:55,904 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:14:55,904 INFO ]: With dead ends: 14 [2018-06-22 05:14:55,904 INFO ]: Without dead ends: 14 [2018-06-22 05:14:55,904 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2018-06-22 05:14:55,905 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:14:55,906 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:14:55,906 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:14:55,907 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:14:55,907 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:14:55,907 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:14:55,907 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:14:55,907 INFO ]: Interpolant automaton has 11 states. [2018-06-22 05:14:55,907 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:14:55,907 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:14:55,907 INFO ]: Found error trace [2018-06-22 05:14:55,907 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:14:55,907 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:14:55,907 INFO ]: Analyzing trace with hash 679342766, now seen corresponding path program 5 times [2018-06-22 05:14:55,907 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:14:55,908 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:14:55,908 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:14:55,908 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:14:55,908 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:14:55,984 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:14:56,479 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:14:56,479 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:14:56,479 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:14:56,501 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:14:56,534 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:14:56,534 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:14:56,539 INFO ]: Computing forward predicates... [2018-06-22 05:14:57,033 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2018-06-22 05:15:02,360 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:15:02,381 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:15:02,381 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-06-22 05:15:02,381 INFO ]: Interpolant automaton has 12 states [2018-06-22 05:15:02,381 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 05:15:02,381 INFO ]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:15:02,381 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2018-06-22 05:15:02,638 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-06-22 05:15:02,917 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2018-06-22 05:15:02,919 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:15:02,919 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:15:02,919 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 05:15:02,919 INFO ]: Start accepts. Automaton has 12 states. Word has length 13 [2018-06-22 05:15:02,919 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:15:02,919 INFO ]: With dead ends: 15 [2018-06-22 05:15:02,919 INFO ]: Without dead ends: 15 [2018-06-22 05:15:02,920 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2018-06-22 05:15:02,920 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 05:15:02,921 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 05:15:02,921 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 05:15:02,922 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 05:15:02,924 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 05:15:02,924 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:15:02,924 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 05:15:02,924 INFO ]: Interpolant automaton has 12 states. [2018-06-22 05:15:02,924 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 05:15:02,924 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 05:15:02,924 INFO ]: Found error trace [2018-06-22 05:15:02,925 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:15:02,925 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:15:02,925 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 6 times [2018-06-22 05:15:02,925 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:15:02,925 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:15:02,926 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:15:02,926 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:15:02,926 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:15:02,985 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:15:03,461 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:15:03,461 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:15:03,461 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:15:03,480 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:15:03,517 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-22 05:15:03,517 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:15:03,520 INFO ]: Computing forward predicates... [2018-06-22 05:15:04,262 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:15:11,771 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:15:27,801 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:15:27,822 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:15:27,822 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 05:15:27,822 INFO ]: Interpolant automaton has 13 states [2018-06-22 05:15:27,822 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 05:15:27,822 INFO ]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:15:27,822 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2018-06-22 05:15:28,067 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2018-06-22 05:15:28,239 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2018-06-22 05:15:28,503 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2018-06-22 05:15:28,504 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:15:28,504 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-22 05:15:28,504 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 05:15:28,504 INFO ]: Start accepts. Automaton has 13 states. Word has length 14 [2018-06-22 05:15:28,505 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:15:28,505 INFO ]: With dead ends: 16 [2018-06-22 05:15:28,505 INFO ]: Without dead ends: 16 [2018-06-22 05:15:28,505 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2018-06-22 05:15:28,505 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-22 05:15:28,507 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-22 05:15:28,507 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-22 05:15:28,507 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-22 05:15:28,507 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-06-22 05:15:28,507 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:15:28,507 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-22 05:15:28,507 INFO ]: Interpolant automaton has 13 states. [2018-06-22 05:15:28,507 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-22 05:15:28,508 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 05:15:28,508 INFO ]: Found error trace [2018-06-22 05:15:28,508 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:15:28,508 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:15:28,508 INFO ]: Analyzing trace with hash 39881678, now seen corresponding path program 7 times [2018-06-22 05:15:28,508 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:15:28,508 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:15:28,510 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:15:28,510 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:15:28,510 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:15:28,577 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:15:29,699 WARN ]: Spent 855.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-06-22 05:15:29,887 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:15:29,887 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:15:29,888 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:15:29,982 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:15:30,017 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:15:30,021 INFO ]: Computing forward predicates... [2018-06-22 05:15:30,321 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:15:30,325 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 05:15:30,417 WARN ]: expecting exponential blowup for input size 7 Received shutdown request... [2018-06-22 05:15:33,643 INFO ]: Timeout while computing interpolants [2018-06-22 05:15:33,844 WARN ]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:15:33,844 WARN ]: Verification canceled [2018-06-22 05:15:33,848 WARN ]: Timeout [2018-06-22 05:15:33,849 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:15:33 BoogieIcfgContainer [2018-06-22 05:15:33,849 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:15:33,849 INFO ]: Toolchain (without parser) took 62864.34 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 263.8 MB in the beginning and 455.6 MB in the end (delta: -191.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:15:33,850 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 308.3 MB. Free memory is still 273.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:15:33,851 INFO ]: ChcToBoogie took 60.76 ms. Allocated memory is still 308.3 MB. Free memory was 262.8 MB in the beginning and 260.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:15:33,851 INFO ]: Boogie Preprocessor took 45.40 ms. Allocated memory is still 308.3 MB. Free memory was 260.8 MB in the beginning and 259.8 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. [2018-06-22 05:15:33,852 INFO ]: RCFGBuilder took 168.26 ms. Allocated memory is still 308.3 MB. Free memory was 259.8 MB in the beginning and 250.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:15:33,852 INFO ]: TraceAbstraction took 62581.09 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 250.8 MB in the beginning and 455.6 MB in the end (delta: -204.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:15:33,858 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 308.3 MB. Free memory is still 273.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 60.76 ms. Allocated memory is still 308.3 MB. Free memory was 262.8 MB in the beginning and 260.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 45.40 ms. Allocated memory is still 308.3 MB. Free memory was 260.8 MB in the beginning and 259.8 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. * RCFGBuilder took 168.26 ms. Allocated memory is still 308.3 MB. Free memory was 259.8 MB in the beginning and 250.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 62581.09 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 250.8 MB in the beginning and 455.6 MB in the end (delta: -204.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 1467 quantified variables from 13 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 62.4s OverallTime, 8 OverallIterations, 8 TraceHistogramMax, 2.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 49 SDtfs, 21 SDslu, 181 SDs, 0 SdLazy, 72 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 16 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 53.9s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 9841 SizeOfPredicates, 24 NumberOfNonLiveVariables, 884 ConjunctsInSsa, 261 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 0/162 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dillig07.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-15-33-875.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dillig07.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-15-33-875.csv Completed graceful shutdown