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/dillig12.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:15:32,373 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:15:32,375 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:15:32,392 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:15:32,392 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:15:32,393 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:15:32,395 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:15:32,399 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:15:32,401 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:15:32,403 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:15:32,404 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:15:32,404 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:15:32,405 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:15:32,406 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:15:32,411 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:15:32,412 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:15:32,414 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:15:32,427 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:15:32,442 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:15:32,443 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:15:32,444 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:15:32,446 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:15:32,446 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:15:32,447 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:15:32,448 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:15:32,449 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:15:32,451 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:15:32,452 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:15:32,453 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:15:32,453 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:15:32,459 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:15:32,460 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:15:32,460 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:15:32,461 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:15:32,462 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:15:32,462 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:15:32,483 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:15:32,484 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:15:32,484 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:15:32,484 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:15:32,486 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:15:32,486 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:15:32,486 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:15:32,487 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:15:32,487 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:15:32,487 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:15:32,487 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:15:32,487 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:15:32,488 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:15:32,488 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:15:32,488 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:15:32,488 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:15:32,488 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:15:32,490 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:15:32,490 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:15:32,542 INFO ]: Repository-Root is: /tmp [2018-06-22 05:15:32,558 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:15:32,564 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:15:32,565 INFO ]: Initializing SmtParser... [2018-06-22 05:15:32,566 INFO ]: SmtParser initialized [2018-06-22 05:15:32,566 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig12.c.smt2 [2018-06-22 05:15:32,568 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 05:15:32,729 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig12.c.smt2 unknown [2018-06-22 05:15:33,465 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig12.c.smt2 [2018-06-22 05:15:33,494 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:15:33,500 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:15:33,501 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:15:33,501 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:15:33,501 INFO ]: ChcToBoogie initialized [2018-06-22 05:15:33,505 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:15:33" (1/1) ... [2018-06-22 05:15:33,577 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:15:33 Unit [2018-06-22 05:15:33,578 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:15:33,578 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:15:33,578 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:15:33,578 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:15:33,600 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:15:33" (1/1) ... [2018-06-22 05:15:33,600 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:15:33" (1/1) ... [2018-06-22 05:15:33,607 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:15:33" (1/1) ... [2018-06-22 05:15:33,608 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:15:33" (1/1) ... [2018-06-22 05:15:33,621 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:15:33" (1/1) ... [2018-06-22 05:15:33,622 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:15:33" (1/1) ... [2018-06-22 05:15:33,625 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:15:33" (1/1) ... [2018-06-22 05:15:33,627 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:15:33,628 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:15:33,628 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:15:33,628 INFO ]: RCFGBuilder initialized [2018-06-22 05:15:33,629 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:15:33" (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 05:15:33,640 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:15:33,641 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:15:33,641 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:15:33,641 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:15:33,641 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:15:33,641 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 05:15:33,930 INFO ]: Using library mode [2018-06-22 05:15:33,931 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:15:33 BoogieIcfgContainer [2018-06-22 05:15:33,931 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:15:33,932 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:15:33,932 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:15:33,935 INFO ]: TraceAbstraction initialized [2018-06-22 05:15:33,935 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:15:33" (1/3) ... [2018-06-22 05:15:33,936 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626e06a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:15:33, skipping insertion in model container [2018-06-22 05:15:33,936 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:15:33" (2/3) ... [2018-06-22 05:15:33,937 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626e06a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:15:33, skipping insertion in model container [2018-06-22 05:15:33,937 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:15:33" (3/3) ... [2018-06-22 05:15:33,938 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:15:33,947 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:15:33,955 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:15:34,001 INFO ]: Using default assertion order modulation [2018-06-22 05:15:34,002 INFO ]: Interprodecural is true [2018-06-22 05:15:34,002 INFO ]: Hoare is false [2018-06-22 05:15:34,002 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:15:34,002 INFO ]: Backedges is TWOTRACK [2018-06-22 05:15:34,002 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:15:34,002 INFO ]: Difference is false [2018-06-22 05:15:34,002 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:15:34,002 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:15:34,017 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:15:34,031 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:15:34,031 INFO ]: Found error trace [2018-06-22 05:15:34,032 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:15:34,032 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:15:34,038 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:15:34,040 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:15:34,040 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:15:34,078 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:15:34,078 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:15:34,078 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:15:34,123 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:15:34,205 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:15:34,207 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:15:34,207 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:15:34,209 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:15:34,220 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:15:34,220 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:15:34,222 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:15:34,286 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:15:34,286 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:15:34,287 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:15:34,288 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:15:34,289 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:15:34,298 INFO ]: With dead ends: 9 [2018-06-22 05:15:34,298 INFO ]: Without dead ends: 9 [2018-06-22 05:15:34,305 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 05:15:34,319 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:15:34,334 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:15:34,335 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:15:34,336 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:15:34,337 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:15:34,337 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:15:34,337 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:15:34,337 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:15:34,337 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:15:34,337 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:15:34,337 INFO ]: Found error trace [2018-06-22 05:15:34,337 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:15:34,337 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:15:34,337 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:15:34,337 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:15:34,337 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:15:34,338 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:15:34,338 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:15:34,338 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:15:34,385 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:15:34,574 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:15:34,575 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:15:34,575 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 05:15:34,583 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:15:34,651 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:15:34,660 INFO ]: Computing forward predicates... [2018-06-22 05:15:35,152 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:15:35,175 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:15:35,175 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:15:35,175 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:15:35,175 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:15:35,175 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:15:35,176 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:15:35,273 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:15:35,273 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:15:35,273 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:15:35,273 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:15:35,273 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:15:35,274 INFO ]: With dead ends: 11 [2018-06-22 05:15:35,274 INFO ]: Without dead ends: 11 [2018-06-22 05:15:35,274 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:15:35,275 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:15:35,276 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:15:35,276 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:15:35,276 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:15:35,276 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 05:15:35,277 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:15:35,277 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:15:35,277 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:15:35,277 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:15:35,277 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:15:35,277 INFO ]: Found error trace [2018-06-22 05:15:35,277 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:15:35,277 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:15:35,277 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-22 05:15:35,277 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:15:35,278 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:15:35,278 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:15:35,278 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:15:35,278 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:15:35,365 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:15:35,829 WARN ]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:15:35,933 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:15:35,933 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:15:35,933 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 05:15:35,942 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:15:36,032 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:15:36,032 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:15:36,037 INFO ]: Computing forward predicates... [2018-06-22 05:15:38,469 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:15:40,817 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:15:40,851 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:15:40,851 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:15:40,851 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:15:40,851 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:15:40,851 INFO ]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:15:40,852 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:15:40,961 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:15:40,961 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:15:40,961 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:15:40,961 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:15:40,961 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:15:40,962 INFO ]: With dead ends: 12 [2018-06-22 05:15:40,962 INFO ]: Without dead ends: 12 [2018-06-22 05:15:40,962 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:15:40,962 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:15:40,964 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:15:40,964 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:15:40,964 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:15:40,965 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:15:40,965 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:15:40,965 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:15:40,965 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:15:40,965 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:15:40,965 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:15:40,965 INFO ]: Found error trace [2018-06-22 05:15:40,965 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:15:40,965 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:15:40,965 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 3 times [2018-06-22 05:15:40,965 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:15:40,965 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:15:40,966 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:15:40,966 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:15:40,966 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:15:41,029 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:15:41,440 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:15:41,441 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:15:41,441 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 05:15:41,455 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:15:41,547 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:15:41,547 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:15:41,552 INFO ]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown