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/xy0.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 06:08:34,303 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 06:08:34,305 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 06:08:34,320 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 06:08:34,320 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 06:08:34,321 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 06:08:34,325 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 06:08:34,327 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 06:08:34,329 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 06:08:34,329 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 06:08:34,331 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 06:08:34,332 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 06:08:34,332 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 06:08:34,333 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 06:08:34,334 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 06:08:34,337 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 06:08:34,339 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 06:08:34,341 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 06:08:34,352 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 06:08:34,353 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 06:08:34,354 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 06:08:34,356 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 06:08:34,357 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 06:08:34,357 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 06:08:34,358 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 06:08:34,363 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 06:08:34,364 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 06:08:34,364 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 06:08:34,365 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 06:08:34,365 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 06:08:34,370 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 06:08:34,371 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 06:08:34,371 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 06:08:34,371 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 06:08:34,372 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 06:08:34,372 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 06:08:34,385 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 06:08:34,385 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 06:08:34,385 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 06:08:34,385 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 06:08:34,386 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 06:08:34,386 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 06:08:34,387 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 06:08:34,387 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 06:08:34,387 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 06:08:34,387 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 06:08:34,387 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 06:08:34,388 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 06:08:34,388 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 06:08:34,388 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 06:08:34,388 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 06:08:34,388 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 06:08:34,389 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 06:08:34,390 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 06:08:34,390 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 06:08:34,435 INFO ]: Repository-Root is: /tmp [2018-06-22 06:08:34,452 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 06:08:34,458 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 06:08:34,460 INFO ]: Initializing SmtParser... [2018-06-22 06:08:34,460 INFO ]: SmtParser initialized [2018-06-22 06:08:34,461 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/xy0.c.smt2 [2018-06-22 06:08:34,462 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 06:08:34,551 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/xy0.c.smt2 unknown [2018-06-22 06:08:34,870 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/xy0.c.smt2 [2018-06-22 06:08:34,874 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 06:08:34,879 INFO ]: Walking toolchain with 4 elements. [2018-06-22 06:08:34,880 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 06:08:34,880 INFO ]: Initializing ChcToBoogie... [2018-06-22 06:08:34,880 INFO ]: ChcToBoogie initialized [2018-06-22 06:08:34,884 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 06:08:34" (1/1) ... [2018-06-22 06:08:34,933 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:08:34 Unit [2018-06-22 06:08:34,933 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 06:08:34,934 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 06:08:34,934 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 06:08:34,934 INFO ]: Boogie Preprocessor initialized [2018-06-22 06:08:34,954 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:08:34" (1/1) ... [2018-06-22 06:08:34,954 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:08:34" (1/1) ... [2018-06-22 06:08:34,962 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:08:34" (1/1) ... [2018-06-22 06:08:34,962 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:08:34" (1/1) ... [2018-06-22 06:08:34,972 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:08:34" (1/1) ... [2018-06-22 06:08:34,974 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:08:34" (1/1) ... [2018-06-22 06:08:34,975 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:08:34" (1/1) ... [2018-06-22 06:08:34,976 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 06:08:34,977 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 06:08:34,977 INFO ]: Initializing RCFGBuilder... [2018-06-22 06:08:34,977 INFO ]: RCFGBuilder initialized [2018-06-22 06:08:34,978 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:08:34" (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 06:08:34,999 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 06:08:34,999 INFO ]: Found specification of procedure gotoProc [2018-06-22 06:08:34,999 INFO ]: Found implementation of procedure gotoProc [2018-06-22 06:08:34,999 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 06:08:34,999 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 06:08:34,999 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 06:08:35,195 INFO ]: Using library mode [2018-06-22 06:08:35,196 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 06:08:35 BoogieIcfgContainer [2018-06-22 06:08:35,196 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 06:08:35,197 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 06:08:35,197 INFO ]: Initializing TraceAbstraction... [2018-06-22 06:08:35,200 INFO ]: TraceAbstraction initialized [2018-06-22 06:08:35,200 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 06:08:34" (1/3) ... [2018-06-22 06:08:35,201 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b49706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 06:08:35, skipping insertion in model container [2018-06-22 06:08:35,201 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:08:34" (2/3) ... [2018-06-22 06:08:35,201 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b49706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 06:08:35, skipping insertion in model container [2018-06-22 06:08:35,202 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 06:08:35" (3/3) ... [2018-06-22 06:08:35,203 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 06:08:35,213 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 06:08:35,222 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 06:08:35,276 INFO ]: Using default assertion order modulation [2018-06-22 06:08:35,277 INFO ]: Interprodecural is true [2018-06-22 06:08:35,277 INFO ]: Hoare is false [2018-06-22 06:08:35,277 INFO ]: Compute interpolants for FPandBP [2018-06-22 06:08:35,277 INFO ]: Backedges is TWOTRACK [2018-06-22 06:08:35,277 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 06:08:35,277 INFO ]: Difference is false [2018-06-22 06:08:35,277 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 06:08:35,277 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 06:08:35,293 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 06:08:35,307 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 06:08:35,307 INFO ]: Found error trace [2018-06-22 06:08:35,308 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:35,308 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:35,314 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 06:08:35,315 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:35,316 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:35,349 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:35,350 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 06:08:35,350 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:35,385 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:35,456 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:35,458 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 06:08:35,458 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 06:08:35,460 INFO ]: Interpolant automaton has 3 states [2018-06-22 06:08:35,486 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 06:08:35,487 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 06:08:35,489 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 06:08:35,570 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:35,571 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 06:08:35,572 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 06:08:35,573 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 06:08:35,573 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:35,581 INFO ]: With dead ends: 9 [2018-06-22 06:08:35,581 INFO ]: Without dead ends: 9 [2018-06-22 06:08:35,582 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 06:08:35,594 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 06:08:35,621 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 06:08:35,623 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 06:08:35,623 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 06:08:35,624 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 06:08:35,625 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:35,625 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 06:08:35,625 INFO ]: Interpolant automaton has 3 states. [2018-06-22 06:08:35,625 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 06:08:35,625 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 06:08:35,625 INFO ]: Found error trace [2018-06-22 06:08:35,625 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:35,626 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:35,626 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 06:08:35,626 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:35,626 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:35,627 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:35,627 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 06:08:35,627 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:35,650 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:35,737 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:35,737 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:08:35,737 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 06:08:35,745 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 06:08:35,798 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:35,808 INFO ]: Computing forward predicates... [2018-06-22 06:08:35,964 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:35,985 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:08:35,985 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 06:08:35,986 INFO ]: Interpolant automaton has 5 states [2018-06-22 06:08:35,986 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 06:08:35,986 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 06:08:35,986 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 06:08:36,048 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:36,049 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 06:08:36,049 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 06:08:36,049 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 06:08:36,049 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:36,049 INFO ]: With dead ends: 11 [2018-06-22 06:08:36,049 INFO ]: Without dead ends: 11 [2018-06-22 06:08:36,050 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 06:08:36,050 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 06:08:36,051 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 06:08:36,051 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 06:08:36,052 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 06:08:36,052 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 06:08:36,052 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:36,052 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 06:08:36,052 INFO ]: Interpolant automaton has 5 states. [2018-06-22 06:08:36,052 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 06:08:36,052 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 06:08:36,053 INFO ]: Found error trace [2018-06-22 06:08:36,053 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:36,053 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:36,053 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-22 06:08:36,053 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:36,053 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:36,054 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:36,054 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 06:08:36,054 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:36,098 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:36,460 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:36,460 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:08:36,460 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 06:08:36,466 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 06:08:36,499 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 06:08:36,499 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:36,502 INFO ]: Computing forward predicates... [2018-06-22 06:08:36,842 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:36,862 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:08:36,863 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 06:08:36,863 INFO ]: Interpolant automaton has 7 states [2018-06-22 06:08:36,863 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 06:08:36,863 INFO ]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-22 06:08:36,863 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 06:08:37,313 WARN ]: Spent 417.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-06-22 06:08:37,868 WARN ]: Spent 308.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-06-22 06:08:37,869 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:37,869 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 06:08:37,869 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 06:08:37,869 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 06:08:37,870 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:37,870 INFO ]: With dead ends: 13 [2018-06-22 06:08:37,870 INFO ]: Without dead ends: 13 [2018-06-22 06:08:37,870 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-06-22 06:08:37,870 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 06:08:37,872 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 06:08:37,872 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 06:08:37,872 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 06:08:37,872 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 06:08:37,872 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:37,872 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 06:08:37,872 INFO ]: Interpolant automaton has 7 states. [2018-06-22 06:08:37,872 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 06:08:37,872 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 06:08:37,872 INFO ]: Found error trace [2018-06-22 06:08:37,873 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:37,873 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:37,873 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 3 times [2018-06-22 06:08:37,873 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:37,873 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:37,874 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:37,874 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 06:08:37,874 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:37,934 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:38,222 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:38,223 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:08:38,223 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 06:08:38,235 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 06:08:38,295 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 06:08:38,295 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:38,298 INFO ]: Computing forward predicates... [2018-06-22 06:08:38,976 WARN ]: Spent 223.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 18 [2018-06-22 06:08:39,428 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 19 [2018-06-22 06:08:40,078 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:40,111 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:08:40,111 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 06:08:40,111 INFO ]: Interpolant automaton has 13 states [2018-06-22 06:08:40,111 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 06:08:40,111 INFO ]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-06-22 06:08:40,112 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-06-22 06:08:40,515 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2018-06-22 06:08:40,516 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:40,516 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 06:08:40,516 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 06:08:40,516 INFO ]: Start accepts. Automaton has 13 states. Word has length 12 [2018-06-22 06:08:40,516 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:40,517 INFO ]: With dead ends: 15 [2018-06-22 06:08:40,517 INFO ]: Without dead ends: 15 [2018-06-22 06:08:40,517 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2018-06-22 06:08:40,517 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 06:08:40,519 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 06:08:40,519 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 06:08:40,520 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 06:08:40,520 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-06-22 06:08:40,520 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:40,520 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 06:08:40,520 INFO ]: Interpolant automaton has 13 states. [2018-06-22 06:08:40,520 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 06:08:40,520 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 06:08:40,520 INFO ]: Found error trace [2018-06-22 06:08:40,520 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:40,520 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:40,521 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 4 times [2018-06-22 06:08:40,521 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:40,521 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:40,523 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:40,523 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 06:08:40,523 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:40,606 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:40,860 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:40,860 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:08:40,860 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 06:08:40,866 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 06:08:40,919 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 06:08:40,919 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:40,924 INFO ]: Computing forward predicates... [2018-06-22 06:08:42,316 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 06:08:42,340 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 06:08:42,407 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 06:08:42,423 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 06:08:42,536 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:42,603 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,650 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,664 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,669 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,674 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,699 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,704 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,709 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,711 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,716 WARN ]: expecting exponential blowup for input size 10 [2018-06-22 06:08:47,823 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,828 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,835 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 06:08:47,848 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,852 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 06:08:47,912 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 06:08:47,926 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,928 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,933 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 06:08:47,953 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 06:08:47,961 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,993 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:47,998 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:48,005 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:48,026 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:48,044 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:48,088 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:48,090 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:48,132 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:48,138 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:55,026 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 06:08:55,079 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 06:08:55,137 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:55,150 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 06:08:55,215 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 06:08:55,287 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 06:08:55,417 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 06:08:55,445 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:09:02,525 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:09:02,558 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:09:02,558 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 06:09:02,558 INFO ]: Interpolant automaton has 17 states [2018-06-22 06:09:02,559 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 06:09:02,559 INFO ]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2018-06-22 06:09:02,559 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 17 states. [2018-06-22 06:09:03,094 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:09:03,094 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-22 06:09:03,094 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 06:09:03,094 INFO ]: Start accepts. Automaton has 17 states. Word has length 14 [2018-06-22 06:09:03,094 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:09:03,095 INFO ]: With dead ends: 17 [2018-06-22 06:09:03,095 INFO ]: Without dead ends: 17 [2018-06-22 06:09:03,095 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2018-06-22 06:09:03,095 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 06:09:03,097 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 06:09:03,097 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 06:09:03,097 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-22 06:09:03,097 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-06-22 06:09:03,097 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:09:03,097 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-22 06:09:03,097 INFO ]: Interpolant automaton has 17 states. [2018-06-22 06:09:03,097 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-22 06:09:03,098 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 06:09:03,098 INFO ]: Found error trace [2018-06-22 06:09:03,098 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:09:03,098 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:09:03,098 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 5 times [2018-06-22 06:09:03,098 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:09:03,098 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:09:03,099 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:09:03,099 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 06:09:03,099 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:09:03,242 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:09:03,752 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2018-06-22 06:09:03,882 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:09:03,882 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:09:03,882 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 06:09:03,896 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 06:09:03,949 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 06:09:03,949 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:09:03,954 INFO ]: Computing forward predicates... [2018-06-22 06:09:10,579 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:09:10,598 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:09:10,598 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2018-06-22 06:09:10,599 INFO ]: Interpolant automaton has 14 states [2018-06-22 06:09:10,599 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 06:09:10,599 INFO ]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2018-06-22 06:09:10,599 INFO ]: Start difference. First operand 17 states and 17 transitions. Second operand 14 states. [2018-06-22 06:09:10,885 WARN ]: Spent 240.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2018-06-22 06:09:11,047 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2018-06-22 06:09:11,246 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2018-06-22 06:09:11,393 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2018-06-22 06:09:11,882 WARN ]: Spent 312.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2018-06-22 06:09:11,884 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:09:11,884 INFO ]: Finished difference Result 18 states and 18 transitions. [2018-06-22 06:09:11,884 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 06:09:11,884 INFO ]: Start accepts. Automaton has 14 states. Word has length 16 [2018-06-22 06:09:11,884 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:09:11,884 INFO ]: With dead ends: 18 [2018-06-22 06:09:11,884 INFO ]: Without dead ends: 18 [2018-06-22 06:09:11,884 INFO ]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2018-06-22 06:09:11,885 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-22 06:09:11,886 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-06-22 06:09:11,886 INFO ]: Start removeUnreachable. Operand 18 states. [2018-06-22 06:09:11,887 INFO ]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-06-22 06:09:11,887 INFO ]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-06-22 06:09:11,887 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:09:11,887 INFO ]: Abstraction has 18 states and 18 transitions. [2018-06-22 06:09:11,887 INFO ]: Interpolant automaton has 14 states. [2018-06-22 06:09:11,887 INFO ]: Start isEmpty. Operand 18 states and 18 transitions. [2018-06-22 06:09:11,887 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 06:09:11,887 INFO ]: Found error trace [2018-06-22 06:09:11,887 INFO ]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:09:11,887 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:09:11,887 INFO ]: Analyzing trace with hash 1509090572, now seen corresponding path program 6 times [2018-06-22 06:09:11,887 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:09:11,887 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:09:11,888 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:09:11,888 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 06:09:11,888 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:09:11,938 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:09:12,316 INFO ]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:09:12,316 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:09:12,316 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 06:09:12,324 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 06:09:12,399 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-06-22 06:09:12,399 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:09:12,404 INFO ]: Computing forward predicates... [2018-06-22 06:09:29,166 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 19 [2018-06-22 06:09:30,311 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:09:30,314 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:09:30,321 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:09:30,329 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 06:09:30,354 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 06:09:30,631 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:09:33,401 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2018-06-22 06:09:35,080 INFO ]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:09:35,101 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:09:35,101 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2018-06-22 06:09:35,101 INFO ]: Interpolant automaton has 18 states [2018-06-22 06:09:35,101 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 06:09:35,102 INFO ]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-06-22 06:09:35,102 INFO ]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. Received shutdown request... [2018-06-22 06:09:35,175 WARN ]: Removed 11 from assertion stack [2018-06-22 06:09:35,175 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 06:09:35,175 WARN ]: Verification canceled [2018-06-22 06:09:35,179 WARN ]: Timeout [2018-06-22 06:09:35,179 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 06:09:35 BoogieIcfgContainer [2018-06-22 06:09:35,179 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 06:09:35,180 INFO ]: Toolchain (without parser) took 60304.87 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 264.4 MB in the beginning and 552.0 MB in the end (delta: -287.6 MB). Peak memory consumption was 917.2 MB. Max. memory is 3.6 GB. [2018-06-22 06:09:35,181 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 06:09:35,181 INFO ]: ChcToBoogie took 53.40 ms. Allocated memory is still 308.8 MB. Free memory was 263.4 MB in the beginning and 261.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 06:09:35,181 INFO ]: Boogie Preprocessor took 42.68 ms. Allocated memory is still 308.8 MB. Free memory was 261.4 MB in the beginning and 260.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 06:09:35,182 INFO ]: RCFGBuilder took 218.94 ms. Allocated memory is still 308.8 MB. Free memory was 260.4 MB in the beginning and 251.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-22 06:09:35,182 INFO ]: TraceAbstraction took 59981.72 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 251.4 MB in the beginning and 552.0 MB in the end (delta: -300.6 MB). Peak memory consumption was 904.2 MB. Max. memory is 3.6 GB. [2018-06-22 06:09:35,186 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 53.40 ms. Allocated memory is still 308.8 MB. Free memory was 263.4 MB in the beginning and 261.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 42.68 ms. Allocated memory is still 308.8 MB. Free memory was 261.4 MB in the beginning and 260.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 218.94 ms. Allocated memory is still 308.8 MB. Free memory was 260.4 MB in the beginning and 251.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 59981.72 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 251.4 MB in the beginning and 552.0 MB in the end (delta: -300.6 MB). Peak memory consumption was 904.2 MB. 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 constructing difference of abstraction (18states) and interpolant automaton (currently 3 states, 18 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 50. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 59.9s OverallTime, 7 OverallIterations, 10 TraceHistogramMax, 3.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 45 SDtfs, 22 SDslu, 184 SDs, 0 SdLazy, 69 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 47 SyntacticMatches, 17 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 6.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=6, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 55.2s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 148 ConstructedInterpolants, 0 QuantifiedInterpolants, 17251 SizeOfPredicates, 24 NumberOfNonLiveVariables, 1120 ConjunctsInSsa, 363 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 0/300 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/xy0.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_06-09-35-200.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/xy0.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_06-09-35-200.csv Completed graceful shutdown