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/nest-if.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:44:50,357 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:44:50,359 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:44:50,370 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:44:50,370 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:44:50,372 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:44:50,373 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:44:50,377 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:44:50,379 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:44:50,379 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:44:50,380 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:44:50,380 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:44:50,383 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:44:50,384 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:44:50,385 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:44:50,385 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:44:50,390 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:44:50,401 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:44:50,402 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:44:50,403 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:44:50,404 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:44:50,414 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:44:50,414 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:44:50,414 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:44:50,415 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:44:50,416 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:44:50,417 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:44:50,417 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:44:50,418 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:44:50,419 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:44:50,419 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:44:50,420 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:44:50,420 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:44:50,424 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:44:50,425 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:44:50,425 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:44:50,447 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:44:50,448 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:44:50,448 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:44:50,448 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:44:50,449 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:44:50,449 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:44:50,450 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:44:50,450 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:44:50,450 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:44:50,450 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:44:50,450 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:44:50,451 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:44:50,451 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:44:50,451 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:44:50,452 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:44:50,452 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:44:50,452 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:44:50,453 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:44:50,454 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:44:50,512 INFO ]: Repository-Root is: /tmp [2018-06-22 05:44:50,558 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:44:50,563 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:44:50,565 INFO ]: Initializing SmtParser... [2018-06-22 05:44:50,566 INFO ]: SmtParser initialized [2018-06-22 05:44:50,566 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if.c.smt2 [2018-06-22 05:44:50,567 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 05:44:50,659 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if.c.smt2 unknown [2018-06-22 05:44:50,880 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if.c.smt2 [2018-06-22 05:44:50,885 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:44:50,891 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:44:50,892 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:44:50,892 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:44:50,892 INFO ]: ChcToBoogie initialized [2018-06-22 05:44:50,895 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:44:50" (1/1) ... [2018-06-22 05:44:50,954 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:50 Unit [2018-06-22 05:44:50,954 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:44:50,955 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:44:50,955 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:44:50,955 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:44:50,978 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:50" (1/1) ... [2018-06-22 05:44:50,978 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:50" (1/1) ... [2018-06-22 05:44:50,984 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:50" (1/1) ... [2018-06-22 05:44:50,984 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:50" (1/1) ... [2018-06-22 05:44:50,997 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:50" (1/1) ... [2018-06-22 05:44:50,998 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:50" (1/1) ... [2018-06-22 05:44:51,007 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:50" (1/1) ... [2018-06-22 05:44:51,009 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:44:51,009 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:44:51,009 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:44:51,009 INFO ]: RCFGBuilder initialized [2018-06-22 05:44:51,010 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:50" (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 05:44:51,035 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:44:51,035 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:44:51,035 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:44:51,035 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:44:51,035 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:44:51,035 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 05:44:51,277 INFO ]: Using library mode [2018-06-22 05:44:51,278 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:44:51 BoogieIcfgContainer [2018-06-22 05:44:51,278 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:44:51,279 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:44:51,279 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:44:51,287 INFO ]: TraceAbstraction initialized [2018-06-22 05:44:51,287 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:44:50" (1/3) ... [2018-06-22 05:44:51,288 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fa92bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:44:51, skipping insertion in model container [2018-06-22 05:44:51,288 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:44:50" (2/3) ... [2018-06-22 05:44:51,288 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fa92bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:44:51, skipping insertion in model container [2018-06-22 05:44:51,288 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:44:51" (3/3) ... [2018-06-22 05:44:51,290 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:44:51,300 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:44:51,310 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:44:51,372 INFO ]: Using default assertion order modulation [2018-06-22 05:44:51,373 INFO ]: Interprodecural is true [2018-06-22 05:44:51,373 INFO ]: Hoare is false [2018-06-22 05:44:51,373 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:44:51,373 INFO ]: Backedges is TWOTRACK [2018-06-22 05:44:51,373 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:44:51,373 INFO ]: Difference is false [2018-06-22 05:44:51,373 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:44:51,373 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:44:51,392 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:44:51,407 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:44:51,407 INFO ]: Found error trace [2018-06-22 05:44:51,408 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:44:51,408 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:44:51,414 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:44:51,417 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:44:51,417 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:44:51,461 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:51,461 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:44:51,461 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:51,513 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:51,581 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:51,583 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:44:51,583 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:44:51,584 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:44:51,596 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:44:51,596 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:44:51,598 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:44:51,670 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:44:51,670 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:44:51,670 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:44:51,672 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:44:51,672 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:44:51,701 INFO ]: With dead ends: 9 [2018-06-22 05:44:51,701 INFO ]: Without dead ends: 9 [2018-06-22 05:44:51,705 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 05:44:51,729 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:44:51,745 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:44:51,746 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:44:51,747 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:44:51,752 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:44:51,753 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:44:51,753 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:44:51,753 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:44:51,753 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:44:51,753 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:44:51,753 INFO ]: Found error trace [2018-06-22 05:44:51,753 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:44:51,753 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:44:51,753 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:44:51,753 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:44:51,753 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:44:51,754 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:51,754 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:44:51,754 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:51,818 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:51,950 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:51,950 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:44:51,950 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 05:44:51,959 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:44:52,015 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:52,025 INFO ]: Computing forward predicates... [2018-06-22 05:44:52,155 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:52,186 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:44:52,187 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:44:52,187 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:44:52,187 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:44:52,187 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:44:52,187 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:44:52,277 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:44:52,277 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:44:52,280 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:44:52,280 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:44:52,280 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:44:52,280 INFO ]: With dead ends: 10 [2018-06-22 05:44:52,281 INFO ]: Without dead ends: 10 [2018-06-22 05:44:52,281 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:44:52,282 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:44:52,283 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:44:52,283 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:44:52,283 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:44:52,283 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:44:52,283 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:44:52,283 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:44:52,283 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:44:52,283 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:44:52,284 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:44:52,284 INFO ]: Found error trace [2018-06-22 05:44:52,284 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:44:52,284 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:44:52,284 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:44:52,284 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:44:52,284 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:44:52,285 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:52,285 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:44:52,285 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:52,339 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:52,609 WARN ]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:44:52,788 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:44:52,789 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:52,789 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:44:52,789 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 05:44:52,796 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:44:52,847 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:44:52,847 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:52,849 INFO ]: Computing forward predicates... [2018-06-22 05:44:55,798 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:55,829 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:44:55,830 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:44:55,830 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:44:55,830 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:44:55,830 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:44:55,830 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:44:56,512 WARN ]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:44:56,577 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:44:56,577 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:44:56,581 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:44:56,581 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:44:56,581 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:44:56,581 INFO ]: With dead ends: 11 [2018-06-22 05:44:56,582 INFO ]: Without dead ends: 11 [2018-06-22 05:44:56,582 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:44:56,582 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:44:56,583 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:44:56,583 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:44:56,583 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:44:56,583 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:44:56,583 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:44:56,583 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:44:56,584 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:44:56,584 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:44:56,584 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:44:56,584 INFO ]: Found error trace [2018-06-22 05:44:56,584 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:44:56,584 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:44:56,584 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:44:56,584 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:44:56,584 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:44:56,585 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:56,585 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:44:56,585 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:44:56,634 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:57,140 WARN ]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 05:44:57,220 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:57,220 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:44:57,220 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 05:44:57,226 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:44:57,266 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:44:57,266 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:44:57,269 INFO ]: Computing forward predicates... [2018-06-22 05:44:59,646 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:44:59,681 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:44:59,681 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:44:59,682 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:44:59,682 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:44:59,682 INFO ]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:44:59,682 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:45:00,144 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2018-06-22 05:45:00,196 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:45:00,196 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:45:00,196 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:45:00,197 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:45:00,197 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:45:00,197 INFO ]: With dead ends: 12 [2018-06-22 05:45:00,197 INFO ]: Without dead ends: 12 [2018-06-22 05:45:00,197 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:45:00,197 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:45:00,198 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:45:00,198 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:45:00,198 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:45:00,198 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:45:00,198 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:45:00,198 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:45:00,198 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:45:00,198 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:45:00,199 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:45:00,199 INFO ]: Found error trace [2018-06-22 05:45:00,199 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:45:00,199 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:45:00,199 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:45:00,199 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:45:00,199 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:45:00,199 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:45:00,199 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:45:00,199 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:45:00,237 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:45:00,477 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:45:00,477 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:45:00,477 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 05:45:00,483 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:45:00,513 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:45:00,514 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:45:00,516 INFO ]: Computing forward predicates... [2018-06-22 05:45:02,839 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 7 [2018-06-22 05:45:03,250 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:45:03,270 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:45:03,270 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 05:45:03,271 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:45:03,271 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:45:03,271 INFO ]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:45:03,271 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2018-06-22 05:45:03,459 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:45:03,459 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:45:03,460 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:45:03,460 INFO ]: Start accepts. Automaton has 9 states. Word has length 11 [2018-06-22 05:45:03,460 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:45:03,461 INFO ]: With dead ends: 13 [2018-06-22 05:45:03,461 INFO ]: Without dead ends: 13 [2018-06-22 05:45:03,461 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:45:03,461 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:45:03,462 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:45:03,462 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:45:03,463 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:45:03,463 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:45:03,463 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:45:03,463 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:45:03,463 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:45:03,463 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:45:03,463 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:45:03,463 INFO ]: Found error trace [2018-06-22 05:45:03,463 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:45:03,463 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:45:03,464 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-22 05:45:03,464 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:45:03,464 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:45:03,465 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:45:03,465 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:45:03,465 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:45:03,526 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:45:04,462 WARN ]: Spent 687.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 18 [2018-06-22 05:45:04,694 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:45:04,695 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:45:04,695 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 05:45:04,704 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:45:04,792 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:45:04,792 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:45:04,796 INFO ]: Computing forward predicates... [2018-06-22 05:45:07,920 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:45:07,940 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:45:07,960 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 05:45:07,960 INFO ]: Interpolant automaton has 12 states [2018-06-22 05:45:07,960 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 05:45:07,960 INFO ]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:45:07,960 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-06-22 05:45:08,234 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:45:08,234 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:45:08,234 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:45:08,234 INFO ]: Start accepts. Automaton has 12 states. Word has length 12 [2018-06-22 05:45:08,234 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:45:08,235 INFO ]: With dead ends: 14 [2018-06-22 05:45:08,235 INFO ]: Without dead ends: 14 [2018-06-22 05:45:08,235 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2018-06-22 05:45:08,235 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:45:08,237 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:45:08,237 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:45:08,237 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:45:08,237 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:45:08,237 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:45:08,237 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:45:08,237 INFO ]: Interpolant automaton has 12 states. [2018-06-22 05:45:08,237 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:45:08,238 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:45:08,238 INFO ]: Found error trace [2018-06-22 05:45:08,238 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:45:08,238 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:45:08,238 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-22 05:45:08,238 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:45:08,238 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:45:08,239 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:45:08,239 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:45:08,239 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:45:08,302 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:45:09,406 WARN ]: Spent 841.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2018-06-22 05:45:09,818 WARN ]: Spent 216.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-06-22 05:45:09,838 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:45:09,838 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:45:09,838 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 05:45:09,850 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:45:09,929 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 05:45:09,929 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:45:09,933 INFO ]: Computing forward predicates... [2018-06-22 05:45:11,596 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:45:11,629 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:45:11,629 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-06-22 05:45:11,629 INFO ]: Interpolant automaton has 14 states [2018-06-22 05:45:11,629 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 05:45:11,630 INFO ]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-06-22 05:45:11,630 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-06-22 05:45:11,966 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:45:11,966 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:45:11,966 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 05:45:11,966 INFO ]: Start accepts. Automaton has 14 states. Word has length 13 [2018-06-22 05:45:11,966 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:45:11,967 INFO ]: With dead ends: 15 [2018-06-22 05:45:11,967 INFO ]: Without dead ends: 15 [2018-06-22 05:45:11,967 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2018-06-22 05:45:11,967 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 05:45:11,969 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 05:45:11,969 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 05:45:11,969 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 05:45:11,969 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 05:45:11,969 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:45:11,969 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 05:45:11,969 INFO ]: Interpolant automaton has 14 states. [2018-06-22 05:45:11,969 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 05:45:11,970 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 05:45:11,970 INFO ]: Found error trace [2018-06-22 05:45:11,970 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:45:11,970 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:45:11,970 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 7 times [2018-06-22 05:45:11,970 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:45:11,970 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:45:11,971 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:45:11,971 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:45:11,971 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:45:12,018 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:45:12,388 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-06-22 05:45:12,542 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:45:12,543 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:45:12,543 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 05:45:12,551 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:45:12,613 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:45:12,618 INFO ]: Computing forward predicates... [2018-06-22 05:45:14,744 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-22 05:45:54,994 INFO ]: Timeout while computing interpolants [2018-06-22 05:45:55,195 WARN ]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:45:55,195 WARN ]: Verification canceled [2018-06-22 05:45:55,201 WARN ]: Timeout [2018-06-22 05:45:55,201 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:45:55 BoogieIcfgContainer [2018-06-22 05:45:55,201 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:45:55,202 INFO ]: Toolchain (without parser) took 64317.03 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 259.0 MB in the beginning and 791.7 MB in the end (delta: -532.6 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 05:45:55,203 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 305.7 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:45:55,203 INFO ]: ChcToBoogie took 62.43 ms. Allocated memory is still 305.7 MB. Free memory was 259.0 MB in the beginning and 256.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:45:55,206 INFO ]: Boogie Preprocessor took 54.22 ms. Allocated memory is still 305.7 MB. Free memory was 256.1 MB in the beginning and 255.1 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 05:45:55,207 INFO ]: RCFGBuilder took 268.55 ms. Allocated memory is still 305.7 MB. Free memory was 255.1 MB in the beginning and 245.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:45:55,207 INFO ]: TraceAbstraction took 63921.96 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.1 MB in the beginning and 791.7 MB in the end (delta: -546.6 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 05:45:55,217 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 305.7 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 62.43 ms. Allocated memory is still 305.7 MB. Free memory was 259.0 MB in the beginning and 256.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 54.22 ms. Allocated memory is still 305.7 MB. Free memory was 256.1 MB in the beginning and 255.1 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 268.55 ms. Allocated memory is still 305.7 MB. Free memory was 255.1 MB in the beginning and 245.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63921.96 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.1 MB in the beginning and 791.7 MB in the end (delta: -546.6 MB). Peak memory consumption was 1.4 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 15 with TraceHistMax 7, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 37532 quantified variables from 14 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 63.8s OverallTime, 8 OverallIterations, 7 TraceHistogramMax, 2.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 49 SDtfs, 17 SDslu, 143 SDs, 0 SdLazy, 56 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 46 SyntacticMatches, 11 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 0.6s SatisfiabilityAnalysisTime, 17.1s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 6644 SizeOfPredicates, 30 NumberOfNonLiveVariables, 993 ConjunctsInSsa, 215 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 0/112 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/nest-if.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-45-55-241.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-45-55-241.csv Completed graceful shutdown