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/gulwani_cegar1.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 01:00:28,222 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 01:00:28,224 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 01:00:28,237 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 01:00:28,237 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 01:00:28,238 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 01:00:28,239 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 01:00:28,243 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 01:00:28,247 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 01:00:28,248 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 01:00:28,248 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 01:00:28,249 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 01:00:28,250 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 01:00:28,251 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 01:00:28,251 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 01:00:28,252 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 01:00:28,253 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 01:00:28,255 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 01:00:28,257 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 01:00:28,258 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 01:00:28,259 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 01:00:28,261 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 01:00:28,261 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 01:00:28,261 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 01:00:28,262 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 01:00:28,263 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 01:00:28,264 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 01:00:28,265 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 01:00:28,266 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 01:00:28,266 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 01:00:28,266 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 01:00:28,267 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 01:00:28,267 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 01:00:28,268 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 01:00:28,269 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 01:00:28,269 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 01:00:28,285 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 01:00:28,286 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 01:00:28,286 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 01:00:28,286 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 01:00:28,287 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 01:00:28,287 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 01:00:28,287 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 01:00:28,288 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 01:00:28,288 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 01:00:28,288 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 01:00:28,288 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 01:00:28,288 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 01:00:28,289 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 01:00:28,289 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 01:00:28,289 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 01:00:28,289 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 01:00:28,289 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 01:00:28,289 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 01:00:28,290 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 01:00:28,290 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 01:00:28,290 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 01:00:28,291 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 01:00:28,291 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 01:00:28,326 INFO ]: Repository-Root is: /tmp [2018-06-25 01:00:28,345 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 01:00:28,351 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 01:00:28,352 INFO ]: Initializing SmtParser... [2018-06-25 01:00:28,353 INFO ]: SmtParser initialized [2018-06-25 01:00:28,353 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar1.c.smt2 [2018-06-25 01:00:28,355 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 [2018-06-25 01:00:28,447 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar1.c.smt2 unknown [2018-06-25 01:00:28,743 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar1.c.smt2 [2018-06-25 01:00:28,748 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 01:00:28,753 INFO ]: Walking toolchain with 5 elements. [2018-06-25 01:00:28,754 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 01:00:28,754 INFO ]: Initializing ChcToBoogie... [2018-06-25 01:00:28,754 INFO ]: ChcToBoogie initialized [2018-06-25 01:00:28,757 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:00:28" (1/1) ... [2018-06-25 01:00:28,812 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:00:28 Unit [2018-06-25 01:00:28,812 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 01:00:28,813 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 01:00:28,813 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 01:00:28,813 INFO ]: Boogie Preprocessor initialized [2018-06-25 01:00:28,834 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:00:28" (1/1) ... [2018-06-25 01:00:28,834 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:00:28" (1/1) ... [2018-06-25 01:00:28,841 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:00:28" (1/1) ... [2018-06-25 01:00:28,841 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:00:28" (1/1) ... [2018-06-25 01:00:28,844 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:00:28" (1/1) ... [2018-06-25 01:00:28,846 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:00:28" (1/1) ... [2018-06-25 01:00:28,847 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:00:28" (1/1) ... [2018-06-25 01:00:28,849 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 01:00:28,850 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 01:00:28,850 INFO ]: Initializing RCFGBuilder... [2018-06-25 01:00:28,850 INFO ]: RCFGBuilder initialized [2018-06-25 01:00:28,851 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:00:28" (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) [2018-06-25 01:00:28,869 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 01:00:28,869 INFO ]: Found specification of procedure gotoProc [2018-06-25 01:00:28,870 INFO ]: Found implementation of procedure gotoProc [2018-06-25 01:00:28,870 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 01:00:28,870 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 01:00:28,870 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 [2018-06-25 01:00:29,109 INFO ]: Using library mode [2018-06-25 01:00:29,110 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:00:29 BoogieIcfgContainer [2018-06-25 01:00:29,110 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 01:00:29,110 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-25 01:00:29,110 INFO ]: Initializing BlockEncodingV2... [2018-06-25 01:00:29,121 INFO ]: BlockEncodingV2 initialized [2018-06-25 01:00:29,121 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:00:29" (1/1) ... [2018-06-25 01:00:29,136 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-25 01:00:29,138 INFO ]: Using Remove infeasible edges [2018-06-25 01:00:29,138 INFO ]: Using Maximize final states [2018-06-25 01:00:29,139 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-25 01:00:29,139 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-25 01:00:29,141 INFO ]: Using Remove sink states [2018-06-25 01:00:29,142 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-25 01:00:29,142 INFO ]: Using Use SBE [2018-06-25 01:00:29,159 WARN ]: aborting because of expected exponential blowup for input size 37 [2018-06-25 01:00:29,161 INFO ]: SBE split 0 edges [2018-06-25 01:00:29,166 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-25 01:00:29,167 INFO ]: 0 new accepting states [2018-06-25 01:00:29,208 INFO ]: Removed 4 edges and 2 locations by large block encoding [2018-06-25 01:00:29,210 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:00:29,213 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-25 01:00:29,213 INFO ]: 0 new accepting states [2018-06-25 01:00:29,214 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-25 01:00:29,215 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:00:29,215 INFO ]: Encoded RCFG 6 locations, 6 edges [2018-06-25 01:00:29,215 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:00:29 BasicIcfg [2018-06-25 01:00:29,215 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-25 01:00:29,217 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 01:00:29,217 INFO ]: Initializing TraceAbstraction... [2018-06-25 01:00:29,220 INFO ]: TraceAbstraction initialized [2018-06-25 01:00:29,220 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:00:28" (1/4) ... [2018-06-25 01:00:29,221 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d53e125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:00:29, skipping insertion in model container [2018-06-25 01:00:29,221 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:00:28" (2/4) ... [2018-06-25 01:00:29,222 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d53e125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:00:29, skipping insertion in model container [2018-06-25 01:00:29,222 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:00:29" (3/4) ... [2018-06-25 01:00:29,222 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d53e125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:00:29, skipping insertion in model container [2018-06-25 01:00:29,222 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:00:29" (4/4) ... [2018-06-25 01:00:29,224 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-25 01:00:29,236 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 01:00:29,255 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 01:00:29,290 INFO ]: Using default assertion order modulation [2018-06-25 01:00:29,290 INFO ]: Interprodecural is true [2018-06-25 01:00:29,290 INFO ]: Hoare is false [2018-06-25 01:00:29,290 INFO ]: Compute interpolants for FPandBP [2018-06-25 01:00:29,290 INFO ]: Backedges is TWOTRACK [2018-06-25 01:00:29,290 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 01:00:29,290 INFO ]: Difference is false [2018-06-25 01:00:29,290 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 01:00:29,291 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 01:00:29,309 INFO ]: Start isEmpty. Operand 6 states. [2018-06-25 01:00:29,319 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 01:00:29,319 INFO ]: Found error trace [2018-06-25 01:00:29,320 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 01:00:29,320 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:00:29,324 INFO ]: Analyzing trace with hash 35402562, now seen corresponding path program 1 times [2018-06-25 01:00:29,325 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:00:29,325 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:00:29,363 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:00:29,363 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:00:29,363 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:00:29,408 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:00:29,516 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:00:29,518 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 01:00:29,518 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 01:00:29,519 INFO ]: Interpolant automaton has 3 states [2018-06-25 01:00:29,530 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 01:00:29,530 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:00:29,533 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-25 01:00:29,578 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:00:29,578 INFO ]: Finished difference Result 7 states and 7 transitions. [2018-06-25 01:00:29,579 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 01:00:29,580 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 01:00:29,580 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:00:29,590 INFO ]: With dead ends: 7 [2018-06-25 01:00:29,590 INFO ]: Without dead ends: 7 [2018-06-25 01:00:29,591 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 [2018-06-25 01:00:29,611 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-25 01:00:29,626 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-25 01:00:29,627 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 01:00:29,628 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-06-25 01:00:29,630 INFO ]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-06-25 01:00:29,630 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:00:29,630 INFO ]: Abstraction has 7 states and 7 transitions. [2018-06-25 01:00:29,630 INFO ]: Interpolant automaton has 3 states. [2018-06-25 01:00:29,630 INFO ]: Start isEmpty. Operand 7 states and 7 transitions. [2018-06-25 01:00:29,630 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:00:29,630 INFO ]: Found error trace [2018-06-25 01:00:29,630 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:00:29,630 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:00:29,631 INFO ]: Analyzing trace with hash 1097183593, now seen corresponding path program 1 times [2018-06-25 01:00:29,631 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:00:29,631 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:00:29,632 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:00:29,632 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:00:29,632 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:00:29,661 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:00:30,020 WARN ]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 01:00:30,021 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:00:30,021 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:00:30,021 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 [2018-06-25 01:00:30,045 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:00:30,095 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:00:30,102 INFO ]: Computing forward predicates... [2018-06-25 01:00:30,755 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:00:30,789 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:00:30,789 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 01:00:30,789 INFO ]: Interpolant automaton has 5 states [2018-06-25 01:00:30,789 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 01:00:30,789 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 01:00:30,790 INFO ]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-06-25 01:00:30,969 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:00:30,969 INFO ]: Finished difference Result 8 states and 8 transitions. [2018-06-25 01:00:30,970 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 01:00:30,970 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-25 01:00:30,970 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:00:30,970 INFO ]: With dead ends: 8 [2018-06-25 01:00:30,970 INFO ]: Without dead ends: 8 [2018-06-25 01:00:30,971 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:00:30,971 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-25 01:00:30,971 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-06-25 01:00:30,971 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 01:00:30,972 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-06-25 01:00:30,972 INFO ]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-06-25 01:00:30,972 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:00:30,972 INFO ]: Abstraction has 8 states and 8 transitions. [2018-06-25 01:00:30,972 INFO ]: Interpolant automaton has 5 states. [2018-06-25 01:00:30,972 INFO ]: Start isEmpty. Operand 8 states and 8 transitions. [2018-06-25 01:00:30,972 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 01:00:30,972 INFO ]: Found error trace [2018-06-25 01:00:30,972 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 01:00:30,972 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:00:30,972 INFO ]: Analyzing trace with hash -347342814, now seen corresponding path program 2 times [2018-06-25 01:00:30,972 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:00:30,972 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:00:30,973 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:00:30,973 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:00:30,973 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:00:31,009 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:00:31,299 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-25 01:00:31,342 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:00:31,342 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:00:31,342 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 [2018-06-25 01:00:31,349 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 01:00:31,389 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 01:00:31,389 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:00:31,391 INFO ]: Computing forward predicates... [2018-06-25 01:00:33,883 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:00:33,914 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:00:33,914 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 01:00:33,915 INFO ]: Interpolant automaton has 6 states [2018-06-25 01:00:33,915 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 01:00:33,915 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:00:33,915 INFO ]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2018-06-25 01:00:34,093 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-25 01:00:34,925 WARN ]: Spent 703.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 10 [2018-06-25 01:00:34,988 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:00:35,016 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 01:00:35,016 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 01:00:35,016 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-25 01:00:35,016 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:00:35,016 INFO ]: With dead ends: 10 [2018-06-25 01:00:35,016 INFO ]: Without dead ends: 10 [2018-06-25 01:00:35,017 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-25 01:00:35,017 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 01:00:35,018 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 01:00:35,018 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 01:00:35,018 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 01:00:35,018 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-06-25 01:00:35,018 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:00:35,018 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 01:00:35,018 INFO ]: Interpolant automaton has 6 states. [2018-06-25 01:00:35,018 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 01:00:35,019 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 01:00:35,019 INFO ]: Found error trace [2018-06-25 01:00:35,019 INFO ]: trace histogram [4, 1, 1, 1, 1, 1] [2018-06-25 01:00:35,019 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:00:35,019 INFO ]: Analyzing trace with hash 1201538306, now seen corresponding path program 3 times [2018-06-25 01:00:35,019 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:00:35,019 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:00:35,020 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:00:35,023 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:00:35,023 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:00:35,119 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:00:35,727 WARN ]: Spent 407.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-06-25 01:00:35,863 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:00:35,864 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:00:35,864 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 [2018-06-25 01:00:35,869 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 01:00:35,913 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 01:00:35,913 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:00:35,916 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 01:01:40,713 INFO ]: Timeout while computing interpolants [2018-06-25 01:01:40,913 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:01:40,913 WARN ]: Verification canceled [2018-06-25 01:01:40,915 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-25 01:01:40,917 WARN ]: Timeout [2018-06-25 01:01:40,917 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:01:40 BasicIcfg [2018-06-25 01:01:40,917 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 01:01:40,918 INFO ]: Toolchain (without parser) took 72169.28 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 262.7 MB in the beginning and 761.4 MB in the end (delta: -498.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 01:01:40,918 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 01:01:40,919 INFO ]: ChcToBoogie took 58.52 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:01:40,919 INFO ]: Boogie Preprocessor took 36.43 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 258.7 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. [2018-06-25 01:01:40,920 INFO ]: RCFGBuilder took 260.13 ms. Allocated memory is still 309.3 MB. Free memory was 258.7 MB in the beginning and 248.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:01:40,920 INFO ]: BlockEncodingV2 took 105.13 ms. Allocated memory is still 309.3 MB. Free memory was 248.7 MB in the beginning and 245.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:01:40,921 INFO ]: TraceAbstraction took 71699.84 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.7 MB in the beginning and 761.4 MB in the end (delta: -515.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 01:01:40,932 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, 6 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.52 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 36.43 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 258.7 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. * RCFGBuilder took 260.13 ms. Allocated memory is still 309.3 MB. Free memory was 258.7 MB in the beginning and 248.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 105.13 ms. Allocated memory is still 309.3 MB. Free memory was 248.7 MB in the beginning and 245.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 71699.84 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 245.7 MB in the beginning and 761.4 MB in the end (delta: -515.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 10 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 15 quantified variables from 27 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 71.6s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 15 SDtfs, 0 SDslu, 21 SDs, 0 SdLazy, 17 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 369 SizeOfPredicates, 10 NumberOfNonLiveVariables, 199 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 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/gulwani_cegar1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-25_01-01-40-949.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulwani_cegar1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-25_01-01-40-949.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulwani_cegar1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-25_01-01-40-949.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulwani_cegar1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_01-01-40-949.csv Completed graceful shutdown