java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.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/bkley.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 21:18:00,209 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 21:18:00,210 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 21:18:00,221 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 21:18:00,222 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 21:18:00,223 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 21:18:00,224 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 21:18:00,232 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 21:18:00,233 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 21:18:00,234 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 21:18:00,235 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 21:18:00,235 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 21:18:00,236 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 21:18:00,237 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 21:18:00,238 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 21:18:00,238 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 21:18:00,242 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 21:18:00,243 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 21:18:00,255 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 21:18:00,257 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 21:18:00,258 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 21:18:00,259 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 21:18:00,261 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 21:18:00,261 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 21:18:00,261 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 21:18:00,262 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 21:18:00,262 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 21:18:00,268 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 21:18:00,269 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 21:18:00,270 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 21:18:00,270 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 21:18:00,270 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 21:18:00,271 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 21:18:00,271 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 21:18:00,272 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 21:18:00,272 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 21:18:00,272 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 21:18:00,286 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 21:18:00,286 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 21:18:00,286 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 21:18:00,287 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 21:18:00,288 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 21:18:00,288 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 21:18:00,288 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 21:18:00,288 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 21:18:00,288 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 21:18:00,289 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 21:18:00,289 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 21:18:00,289 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 21:18:00,289 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 21:18:00,289 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 21:18:00,290 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 21:18:00,290 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 21:18:00,290 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 21:18:00,290 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 21:18:00,290 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 21:18:00,291 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 21:18:00,291 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 21:18:00,292 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 21:18:00,292 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 21:18:00,339 INFO ]: Repository-Root is: /tmp [2018-06-26 21:18:00,355 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 21:18:00,361 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 21:18:00,363 INFO ]: Initializing SmtParser... [2018-06-26 21:18:00,363 INFO ]: SmtParser initialized [2018-06-26 21:18:00,363 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/bkley.c.smt2 [2018-06-26 21:18:00,364 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 [2018-06-26 21:18:00,443 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/bkley.c.smt2 unknown [2018-06-26 21:18:00,759 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/bkley.c.smt2 [2018-06-26 21:18:00,764 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 21:18:00,771 INFO ]: Walking toolchain with 5 elements. [2018-06-26 21:18:00,771 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 21:18:00,772 INFO ]: Initializing ChcToBoogie... [2018-06-26 21:18:00,772 INFO ]: ChcToBoogie initialized [2018-06-26 21:18:00,775 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:18:00" (1/1) ... [2018-06-26 21:18:00,835 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:00 Unit [2018-06-26 21:18:00,835 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 21:18:00,836 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 21:18:00,836 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 21:18:00,836 INFO ]: Boogie Preprocessor initialized [2018-06-26 21:18:00,860 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:00" (1/1) ... [2018-06-26 21:18:00,860 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:00" (1/1) ... [2018-06-26 21:18:00,867 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:00" (1/1) ... [2018-06-26 21:18:00,868 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:00" (1/1) ... [2018-06-26 21:18:00,885 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:00" (1/1) ... [2018-06-26 21:18:00,887 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:00" (1/1) ... [2018-06-26 21:18:00,888 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:00" (1/1) ... [2018-06-26 21:18:00,899 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 21:18:00,900 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 21:18:00,900 INFO ]: Initializing RCFGBuilder... [2018-06-26 21:18:00,900 INFO ]: RCFGBuilder initialized [2018-06-26 21:18:00,901 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:00" (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) [2018-06-26 21:18:00,923 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 21:18:00,923 INFO ]: Found specification of procedure gotoProc [2018-06-26 21:18:00,923 INFO ]: Found implementation of procedure gotoProc [2018-06-26 21:18:00,923 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 21:18:00,923 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 21:18:00,923 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 [2018-06-26 21:18:01,216 INFO ]: Using library mode [2018-06-26 21:18:01,217 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:18:01 BoogieIcfgContainer [2018-06-26 21:18:01,217 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 21:18:01,217 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 21:18:01,217 INFO ]: Initializing BlockEncodingV2... [2018-06-26 21:18:01,218 INFO ]: BlockEncodingV2 initialized [2018-06-26 21:18:01,219 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:18:01" (1/1) ... [2018-06-26 21:18:01,233 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-26 21:18:01,234 INFO ]: Using Remove infeasible edges [2018-06-26 21:18:01,235 INFO ]: Using Maximize final states [2018-06-26 21:18:01,235 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 21:18:01,235 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 21:18:01,238 INFO ]: Using Remove sink states [2018-06-26 21:18:01,238 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 21:18:01,238 INFO ]: Using Use SBE [2018-06-26 21:18:01,242 WARN ]: expecting exponential blowup for input size 7 [2018-06-26 21:18:01,277 WARN ]: aborting because of expected exponential blowup for input size 62 [2018-06-26 21:18:01,288 WARN ]: aborting because of expected exponential blowup for input size 62 [2018-06-26 21:18:01,288 INFO ]: SBE split 1 edges [2018-06-26 21:18:01,293 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-26 21:18:01,294 INFO ]: 0 new accepting states [2018-06-26 21:18:01,371 INFO ]: Removed 6 edges and 2 locations by large block encoding [2018-06-26 21:18:01,372 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:18:01,374 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 21:18:01,374 INFO ]: 0 new accepting states [2018-06-26 21:18:01,374 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 21:18:01,374 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:18:01,374 INFO ]: Encoded RCFG 6 locations, 8 edges [2018-06-26 21:18:01,375 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:18:01 BasicIcfg [2018-06-26 21:18:01,375 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 21:18:01,376 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 21:18:01,376 INFO ]: Initializing TraceAbstraction... [2018-06-26 21:18:01,381 INFO ]: TraceAbstraction initialized [2018-06-26 21:18:01,381 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:18:00" (1/4) ... [2018-06-26 21:18:01,382 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53606894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 09:18:01, skipping insertion in model container [2018-06-26 21:18:01,382 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:00" (2/4) ... [2018-06-26 21:18:01,382 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53606894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 09:18:01, skipping insertion in model container [2018-06-26 21:18:01,382 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:18:01" (3/4) ... [2018-06-26 21:18:01,382 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53606894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:18:01, skipping insertion in model container [2018-06-26 21:18:01,382 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:18:01" (4/4) ... [2018-06-26 21:18:01,385 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 21:18:01,392 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 21:18:01,398 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 21:18:01,443 INFO ]: Using default assertion order modulation [2018-06-26 21:18:01,443 INFO ]: Interprodecural is true [2018-06-26 21:18:01,443 INFO ]: Hoare is false [2018-06-26 21:18:01,443 INFO ]: Compute interpolants for FPandBP [2018-06-26 21:18:01,443 INFO ]: Backedges is TWOTRACK [2018-06-26 21:18:01,443 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 21:18:01,443 INFO ]: Difference is false [2018-06-26 21:18:01,443 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 21:18:01,444 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 21:18:01,455 INFO ]: Start isEmpty. Operand 6 states. [2018-06-26 21:18:01,469 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 21:18:01,469 INFO ]: Found error trace [2018-06-26 21:18:01,469 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 21:18:01,470 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:18:01,475 INFO ]: Analyzing trace with hash 35496740, now seen corresponding path program 1 times [2018-06-26 21:18:01,477 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:18:01,477 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:18:01,519 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:01,519 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:18:01,519 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:01,552 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:01,624 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:01,626 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:18:01,626 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:18:01,628 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:18:01,643 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:18:01,644 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:18:01,646 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-26 21:18:01,718 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:18:01,718 INFO ]: Finished difference Result 7 states and 9 transitions. [2018-06-26 21:18:01,719 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:18:01,720 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 21:18:01,720 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:18:01,728 INFO ]: With dead ends: 7 [2018-06-26 21:18:01,729 INFO ]: Without dead ends: 7 [2018-06-26 21:18:01,731 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 [2018-06-26 21:18:01,748 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-26 21:18:01,766 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-26 21:18:01,767 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 21:18:01,768 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-06-26 21:18:01,769 INFO ]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 5 [2018-06-26 21:18:01,769 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:18:01,769 INFO ]: Abstraction has 7 states and 9 transitions. [2018-06-26 21:18:01,769 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:18:01,769 INFO ]: Start isEmpty. Operand 7 states and 9 transitions. [2018-06-26 21:18:01,770 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 21:18:01,770 INFO ]: Found error trace [2018-06-26 21:18:01,770 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 21:18:01,770 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:18:01,773 INFO ]: Analyzing trace with hash 35526531, now seen corresponding path program 1 times [2018-06-26 21:18:01,773 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:18:01,773 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:18:01,774 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:01,774 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:18:01,774 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:01,783 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:01,821 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:01,821 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:18:01,821 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:18:01,823 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:18:01,823 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:18:01,823 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:18:01,823 INFO ]: Start difference. First operand 7 states and 9 transitions. Second operand 3 states. [2018-06-26 21:18:01,892 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:18:01,892 INFO ]: Finished difference Result 8 states and 10 transitions. [2018-06-26 21:18:01,893 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:18:01,893 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 21:18:01,893 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:18:01,893 INFO ]: With dead ends: 8 [2018-06-26 21:18:01,893 INFO ]: Without dead ends: 8 [2018-06-26 21:18:01,894 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 [2018-06-26 21:18:01,894 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-26 21:18:01,895 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-06-26 21:18:01,895 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 21:18:01,895 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-06-26 21:18:01,896 INFO ]: Start accepts. Automaton has 7 states and 9 transitions. Word has length 5 [2018-06-26 21:18:01,896 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:18:01,896 INFO ]: Abstraction has 7 states and 9 transitions. [2018-06-26 21:18:01,896 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:18:01,896 INFO ]: Start isEmpty. Operand 7 states and 9 transitions. [2018-06-26 21:18:01,896 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:18:01,896 INFO ]: Found error trace [2018-06-26 21:18:01,896 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:18:01,896 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:18:01,896 INFO ]: Analyzing trace with hash 1099988752, now seen corresponding path program 1 times [2018-06-26 21:18:01,896 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:18:01,896 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:18:01,897 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:01,897 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:18:01,898 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:01,952 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:02,084 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:02,084 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:18:02,084 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 [2018-06-26 21:18:02,090 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:18:02,152 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:02,161 INFO ]: Computing forward predicates... [2018-06-26 21:18:03,721 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:03,752 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:18:03,752 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-26 21:18:03,753 INFO ]: Interpolant automaton has 5 states [2018-06-26 21:18:03,753 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 21:18:03,753 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-26 21:18:03,753 INFO ]: Start difference. First operand 7 states and 9 transitions. Second operand 5 states. [2018-06-26 21:18:03,957 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:18:03,957 INFO ]: Finished difference Result 9 states and 11 transitions. [2018-06-26 21:18:03,959 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-26 21:18:03,959 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-26 21:18:03,959 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:18:03,959 INFO ]: With dead ends: 9 [2018-06-26 21:18:03,959 INFO ]: Without dead ends: 9 [2018-06-26 21:18:03,960 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:18:03,960 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-26 21:18:03,961 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-26 21:18:03,961 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:18:03,961 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2018-06-26 21:18:03,961 INFO ]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2018-06-26 21:18:03,961 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:18:03,961 INFO ]: Abstraction has 9 states and 11 transitions. [2018-06-26 21:18:03,961 INFO ]: Interpolant automaton has 5 states. [2018-06-26 21:18:03,961 INFO ]: Start isEmpty. Operand 9 states and 11 transitions. [2018-06-26 21:18:03,961 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-26 21:18:03,961 INFO ]: Found error trace [2018-06-26 21:18:03,961 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-26 21:18:03,962 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:18:03,962 INFO ]: Analyzing trace with hash 514109840, now seen corresponding path program 2 times [2018-06-26 21:18:03,962 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:18:03,962 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:18:03,963 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:03,963 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:18:03,963 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:04,098 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:04,432 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-06-26 21:18:04,516 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:04,516 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:18:04,516 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 [2018-06-26 21:18:04,523 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-26 21:18:04,618 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 21:18:04,618 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:04,623 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-26 21:19:16,017 INFO ]: Timeout while computing interpolants [2018-06-26 21:19:16,218 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:19:16,218 WARN ]: Verification canceled [2018-06-26 21:19:16,219 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 21:19:16,220 WARN ]: Timeout [2018-06-26 21:19:16,220 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:19:16 BasicIcfg [2018-06-26 21:19:16,220 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 21:19:16,221 INFO ]: Toolchain (without parser) took 75456.77 ms. Allocated memory was 303.0 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 248.4 MB in the beginning and 333.7 MB in the end (delta: -85.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-26 21:19:16,222 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 303.0 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 21:19:16,223 INFO ]: ChcToBoogie took 64.22 ms. Allocated memory is still 303.0 MB. Free memory was 248.4 MB in the beginning and 246.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:19:16,223 INFO ]: Boogie Preprocessor took 63.36 ms. Allocated memory is still 303.0 MB. Free memory was 246.4 MB in the beginning and 244.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:19:16,224 INFO ]: RCFGBuilder took 316.94 ms. Allocated memory is still 303.0 MB. Free memory was 244.4 MB in the beginning and 231.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 3.6 GB. [2018-06-26 21:19:16,224 INFO ]: BlockEncodingV2 took 157.57 ms. Allocated memory is still 303.0 MB. Free memory was 231.0 MB in the beginning and 224.0 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:19:16,225 INFO ]: TraceAbstraction took 74844.05 ms. Allocated memory was 303.0 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 223.0 MB in the beginning and 333.7 MB in the end (delta: -110.7 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-26 21:19:16,229 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 10 locations, 10 edges - StatisticsResult: Encoded RCFG 6 locations, 8 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 303.0 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 64.22 ms. Allocated memory is still 303.0 MB. Free memory was 248.4 MB in the beginning and 246.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 63.36 ms. Allocated memory is still 303.0 MB. Free memory was 246.4 MB in the beginning and 244.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 316.94 ms. Allocated memory is still 303.0 MB. Free memory was 244.4 MB in the beginning and 231.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 157.57 ms. Allocated memory is still 303.0 MB. Free memory was 231.0 MB in the beginning and 224.0 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 74844.05 ms. Allocated memory was 303.0 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 223.0 MB in the beginning and 333.7 MB in the end (delta: -110.7 MB). Peak memory consumption was 1.1 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 Cancelled while BasicCegarLoop was analyzing trace of length 9 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 20 quantified variables from 45 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 74.7s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 0 SDslu, 15 SDs, 0 SdLazy, 15 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=3, 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 152 SizeOfPredicates, 6 NumberOfNonLiveVariables, 120 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 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/bkley.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_21-19-16-246.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bkley.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_21-19-16-246.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bkley.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_21-19-16-246.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bkley.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_21-19-16-246.csv Completed graceful shutdown