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/eldarica-misc/LIA/llreve/nested-while_merged_unsafe.c-1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 20:51:58,299 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 20:51:58,302 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 20:51:58,314 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 20:51:58,315 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 20:51:58,316 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 20:51:58,317 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 20:51:58,319 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 20:51:58,321 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 20:51:58,322 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 20:51:58,323 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 20:51:58,323 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 20:51:58,335 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 20:51:58,336 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 20:51:58,336 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 20:51:58,337 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 20:51:58,339 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 20:51:58,340 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 20:51:58,342 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 20:51:58,345 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 20:51:58,346 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 20:51:58,351 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-24 20:51:58,351 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-24 20:51:58,351 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-24 20:51:58,352 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-24 20:51:58,353 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-24 20:51:58,357 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-24 20:51:58,358 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-24 20:51:58,359 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-24 20:51:58,359 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-24 20:51:58,360 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-24 20:51:58,360 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-24 20:51:58,360 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-24 20:51:58,368 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-24 20:51:58,368 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-24 20:51:58,369 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 20:51:58,392 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 20:51:58,392 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 20:51:58,393 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 20:51:58,393 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 20:51:58,394 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 20:51:58,394 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 20:51:58,394 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 20:51:58,394 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 20:51:58,395 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 20:51:58,395 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 20:51:58,395 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 20:51:58,395 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 20:51:58,395 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 20:51:58,396 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 20:51:58,396 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 20:51:58,396 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 20:51:58,396 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 20:51:58,396 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 20:51:58,397 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 20:51:58,397 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 20:51:58,397 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 20:51:58,398 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 20:51:58,398 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 20:51:58,440 INFO ]: Repository-Root is: /tmp [2018-06-24 20:51:58,451 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 20:51:58,455 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 20:51:58,456 INFO ]: Initializing SmtParser... [2018-06-24 20:51:58,456 INFO ]: SmtParser initialized [2018-06-24 20:51:58,458 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/llreve/nested-while_merged_unsafe.c-1.smt2 [2018-06-24 20:51:58,460 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 [2018-06-24 20:51:58,548 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/nested-while_merged_unsafe.c-1.smt2 unknown [2018-06-24 20:51:58,725 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/nested-while_merged_unsafe.c-1.smt2 [2018-06-24 20:51:58,730 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 20:51:58,734 INFO ]: Walking toolchain with 5 elements. [2018-06-24 20:51:58,735 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 20:51:58,735 INFO ]: Initializing ChcToBoogie... [2018-06-24 20:51:58,735 INFO ]: ChcToBoogie initialized [2018-06-24 20:51:58,738 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 08:51:58" (1/1) ... [2018-06-24 20:51:58,794 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:51:58 Unit [2018-06-24 20:51:58,794 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 20:51:58,794 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 20:51:58,794 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 20:51:58,794 INFO ]: Boogie Preprocessor initialized [2018-06-24 20:51:58,815 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:51:58" (1/1) ... [2018-06-24 20:51:58,815 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:51:58" (1/1) ... [2018-06-24 20:51:58,821 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:51:58" (1/1) ... [2018-06-24 20:51:58,821 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:51:58" (1/1) ... [2018-06-24 20:51:58,826 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:51:58" (1/1) ... [2018-06-24 20:51:58,828 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:51:58" (1/1) ... [2018-06-24 20:51:58,829 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:51:58" (1/1) ... [2018-06-24 20:51:58,838 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 20:51:58,839 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 20:51:58,839 INFO ]: Initializing RCFGBuilder... [2018-06-24 20:51:58,839 INFO ]: RCFGBuilder initialized [2018-06-24 20:51:58,840 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:51:58" (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) [2018-06-24 20:51:58,863 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 20:51:58,863 INFO ]: Found specification of procedure gotoProc [2018-06-24 20:51:58,863 INFO ]: Found implementation of procedure gotoProc [2018-06-24 20:51:58,863 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 20:51:58,864 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 20:51:58,864 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 [2018-06-24 20:51:59,216 INFO ]: Using library mode [2018-06-24 20:51:59,217 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 08:51:59 BoogieIcfgContainer [2018-06-24 20:51:59,217 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 20:51:59,217 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 20:51:59,217 INFO ]: Initializing BlockEncodingV2... [2018-06-24 20:51:59,218 INFO ]: BlockEncodingV2 initialized [2018-06-24 20:51:59,219 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 08:51:59" (1/1) ... [2018-06-24 20:51:59,236 INFO ]: Initial Icfg 14 locations, 18 edges [2018-06-24 20:51:59,238 INFO ]: Using Remove infeasible edges [2018-06-24 20:51:59,239 INFO ]: Using Maximize final states [2018-06-24 20:51:59,239 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 20:51:59,240 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 20:51:59,241 INFO ]: Using Remove sink states [2018-06-24 20:51:59,242 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 20:51:59,242 INFO ]: Using Use SBE [2018-06-24 20:51:59,247 INFO ]: SBE split 0 edges [2018-06-24 20:51:59,252 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-24 20:51:59,253 INFO ]: 0 new accepting states [2018-06-24 20:51:59,312 INFO ]: Removed 10 edges and 4 locations by large block encoding [2018-06-24 20:51:59,314 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 20:51:59,317 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 20:51:59,317 INFO ]: 0 new accepting states [2018-06-24 20:51:59,318 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 20:51:59,318 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 20:51:59,318 INFO ]: Encoded RCFG 8 locations, 12 edges [2018-06-24 20:51:59,318 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 08:51:59 BasicIcfg [2018-06-24 20:51:59,318 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 20:51:59,319 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 20:51:59,319 INFO ]: Initializing TraceAbstraction... [2018-06-24 20:51:59,322 INFO ]: TraceAbstraction initialized [2018-06-24 20:51:59,323 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 08:51:58" (1/4) ... [2018-06-24 20:51:59,324 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454846ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 08:51:59, skipping insertion in model container [2018-06-24 20:51:59,324 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:51:58" (2/4) ... [2018-06-24 20:51:59,324 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454846ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 08:51:59, skipping insertion in model container [2018-06-24 20:51:59,324 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 08:51:59" (3/4) ... [2018-06-24 20:51:59,324 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454846ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 08:51:59, skipping insertion in model container [2018-06-24 20:51:59,324 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 08:51:59" (4/4) ... [2018-06-24 20:51:59,326 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 20:51:59,336 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 20:51:59,345 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 20:51:59,393 INFO ]: Using default assertion order modulation [2018-06-24 20:51:59,395 INFO ]: Interprodecural is true [2018-06-24 20:51:59,395 INFO ]: Hoare is false [2018-06-24 20:51:59,395 INFO ]: Compute interpolants for FPandBP [2018-06-24 20:51:59,395 INFO ]: Backedges is TWOTRACK [2018-06-24 20:51:59,395 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 20:51:59,395 INFO ]: Difference is false [2018-06-24 20:51:59,395 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 20:51:59,395 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 20:51:59,404 INFO ]: Start isEmpty. Operand 8 states. [2018-06-24 20:51:59,414 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 20:51:59,414 INFO ]: Found error trace [2018-06-24 20:51:59,415 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 20:51:59,415 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:51:59,420 INFO ]: Analyzing trace with hash 33835429, now seen corresponding path program 1 times [2018-06-24 20:51:59,422 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:51:59,423 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:51:59,454 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:51:59,454 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:51:59,454 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:51:59,507 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:51:59,573 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:51:59,574 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 20:51:59,574 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 20:51:59,575 INFO ]: Interpolant automaton has 3 states [2018-06-24 20:51:59,587 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 20:51:59,587 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 20:51:59,590 INFO ]: Start difference. First operand 8 states. Second operand 3 states. [2018-06-24 20:51:59,693 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 20:51:59,693 INFO ]: Finished difference Result 12 states and 20 transitions. [2018-06-24 20:51:59,693 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 20:51:59,694 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 20:51:59,694 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 20:51:59,701 INFO ]: With dead ends: 12 [2018-06-24 20:51:59,701 INFO ]: Without dead ends: 12 [2018-06-24 20:51:59,703 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 [2018-06-24 20:51:59,716 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-24 20:51:59,736 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 9. [2018-06-24 20:51:59,739 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-24 20:51:59,740 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2018-06-24 20:51:59,741 INFO ]: Start accepts. Automaton has 9 states and 14 transitions. Word has length 5 [2018-06-24 20:51:59,741 INFO ]: Finished accepts. word is rejected. [2018-06-24 20:51:59,741 INFO ]: Abstraction has 9 states and 14 transitions. [2018-06-24 20:51:59,741 INFO ]: Interpolant automaton has 3 states. [2018-06-24 20:51:59,741 INFO ]: Start isEmpty. Operand 9 states and 14 transitions. [2018-06-24 20:51:59,741 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 20:51:59,741 INFO ]: Found error trace [2018-06-24 20:51:59,741 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 20:51:59,742 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:51:59,742 INFO ]: Analyzing trace with hash 1048247809, now seen corresponding path program 1 times [2018-06-24 20:51:59,742 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:51:59,742 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:51:59,744 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:51:59,744 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:51:59,744 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:51:59,760 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:52:00,017 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:52:00,017 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 20:52:00,017 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-24 20:52:00,019 INFO ]: Interpolant automaton has 4 states [2018-06-24 20:52:00,019 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-24 20:52:00,019 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-24 20:52:00,019 INFO ]: Start difference. First operand 9 states and 14 transitions. Second operand 4 states. [2018-06-24 20:52:00,176 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 20:52:00,176 INFO ]: Finished difference Result 12 states and 19 transitions. [2018-06-24 20:52:00,176 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-24 20:52:00,176 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-24 20:52:00,176 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 20:52:00,177 INFO ]: With dead ends: 12 [2018-06-24 20:52:00,177 INFO ]: Without dead ends: 11 [2018-06-24 20:52:00,178 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-24 20:52:00,178 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-24 20:52:00,179 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-06-24 20:52:00,179 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-24 20:52:00,180 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2018-06-24 20:52:00,180 INFO ]: Start accepts. Automaton has 9 states and 13 transitions. Word has length 6 [2018-06-24 20:52:00,180 INFO ]: Finished accepts. word is rejected. [2018-06-24 20:52:00,180 INFO ]: Abstraction has 9 states and 13 transitions. [2018-06-24 20:52:00,180 INFO ]: Interpolant automaton has 4 states. [2018-06-24 20:52:00,180 INFO ]: Start isEmpty. Operand 9 states and 13 transitions. [2018-06-24 20:52:00,180 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-24 20:52:00,180 INFO ]: Found error trace [2018-06-24 20:52:00,180 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-24 20:52:00,180 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:52:00,180 INFO ]: Analyzing trace with hash -1863395014, now seen corresponding path program 1 times [2018-06-24 20:52:00,180 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:52:00,180 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:52:00,183 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:52:00,183 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:52:00,183 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:52:00,213 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:52:00,339 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:52:00,339 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 20:52:00,339 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 20:52:00,339 INFO ]: Interpolant automaton has 3 states [2018-06-24 20:52:00,340 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 20:52:00,340 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 20:52:00,340 INFO ]: Start difference. First operand 9 states and 13 transitions. Second operand 3 states. [2018-06-24 20:52:00,356 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 20:52:00,357 INFO ]: Finished difference Result 10 states and 14 transitions. [2018-06-24 20:52:00,357 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 20:52:00,357 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-24 20:52:00,357 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 20:52:00,357 INFO ]: With dead ends: 10 [2018-06-24 20:52:00,357 INFO ]: Without dead ends: 10 [2018-06-24 20:52:00,358 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 [2018-06-24 20:52:00,358 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-24 20:52:00,359 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-06-24 20:52:00,359 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-24 20:52:00,360 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2018-06-24 20:52:00,360 INFO ]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 7 [2018-06-24 20:52:00,360 INFO ]: Finished accepts. word is rejected. [2018-06-24 20:52:00,360 INFO ]: Abstraction has 9 states and 12 transitions. [2018-06-24 20:52:00,360 INFO ]: Interpolant automaton has 3 states. [2018-06-24 20:52:00,360 INFO ]: Start isEmpty. Operand 9 states and 12 transitions. [2018-06-24 20:52:00,360 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-24 20:52:00,360 INFO ]: Found error trace [2018-06-24 20:52:00,360 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 20:52:00,360 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:52:00,360 INFO ]: Analyzing trace with hash -1931321076, now seen corresponding path program 1 times [2018-06-24 20:52:00,361 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:52:00,361 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:52:00,361 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:52:00,361 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:52:00,361 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:52:00,385 INFO ]: Conjunction of SSA is sat [2018-06-24 20:52:00,388 INFO ]: Counterexample might be feasible [2018-06-24 20:52:00,407 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 20:52:00,408 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 08:52:00 BasicIcfg [2018-06-24 20:52:00,408 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 20:52:00,409 INFO ]: Toolchain (without parser) took 1678.76 ms. Allocated memory is still 307.2 MB. Free memory was 261.6 MB in the beginning and 213.7 MB in the end (delta: 48.0 MB). Peak memory consumption was 48.0 MB. Max. memory is 3.6 GB. [2018-06-24 20:52:00,411 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 307.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 20:52:00,411 INFO ]: ChcToBoogie took 59.19 ms. Allocated memory is still 307.2 MB. Free memory was 261.6 MB in the beginning and 259.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 20:52:00,411 INFO ]: Boogie Preprocessor took 43.87 ms. Allocated memory is still 307.2 MB. Free memory was 259.6 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 20:52:00,412 INFO ]: RCFGBuilder took 378.19 ms. Allocated memory is still 307.2 MB. Free memory was 257.7 MB in the beginning and 245.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-24 20:52:00,412 INFO ]: BlockEncodingV2 took 101.14 ms. Allocated memory is still 307.2 MB. Free memory was 245.7 MB in the beginning and 241.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-24 20:52:00,413 INFO ]: TraceAbstraction took 1088.74 ms. Allocated memory is still 307.2 MB. Free memory was 241.7 MB in the beginning and 213.7 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 3.6 GB. [2018-06-24 20:52:00,418 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 14 locations, 18 edges - StatisticsResult: Encoded RCFG 8 locations, 12 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 307.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 59.19 ms. Allocated memory is still 307.2 MB. Free memory was 261.6 MB in the beginning and 259.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 43.87 ms. Allocated memory is still 307.2 MB. Free memory was 259.6 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 378.19 ms. Allocated memory is still 307.2 MB. Free memory was 257.7 MB in the beginning and 245.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 101.14 ms. Allocated memory is still 307.2 MB. Free memory was 245.7 MB in the beginning and 241.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1088.74 ms. Allocated memory is still 307.2 MB. Free memory was 241.7 MB in the beginning and 213.7 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [UNKNOWN] : assertion can be violated assertion can be violated We found a FailurePath: [L0] CALL call gotoProc(0, 0, 0, 0, 0, 0, 0, 0, 0); [L0] assume !(0 <= hhv_inv_main13_2_Int + -1 * hhv_inv_main13_7_Int + -1); [L0] hhv_inv_main5_0_Int, hhv_inv_main5_1_Int, hhv_inv_main5_2_Int, hhv_inv_main5_3_Int, hhv_inv_main5_4_Int, hhv_inv_main5_5_Int, hhv_inv_main5_6_Int, hhv_inv_main5_7_Int := hhv_inv_main13_0_Int, hhv_inv_main13_1_Int, hhv_inv_main13_2_Int, hhv_inv_main13_3_Int, hhv_inv_main13_4_Int, hhv_inv_main13_5_Int, hhv_inv_main13_6_Int, hhv_inv_main13_7_Int; [L0] assume !(0 <= hhv_inv_main5_7_Int + -1 * hhv_inv_main5_2_Int + -1); [L0] hhv_inv_main16_0_Int, hhv_inv_main16_1_Int, hhv_inv_main16_2_Int, hhv_inv_main16_3_Int, hhv_inv_main16_4_Int, hhv_inv_main16_5_Int, hhv_inv_main16_6_Int, hhv_inv_main16_7_Int := hhv_inv_main5_0_Int, hhv_inv_main5_1_Int, hhv_inv_main5_2_Int, hhv_inv_main5_3_Int, hhv_inv_main5_4_Int, hhv_inv_main5_5_Int, hhv_inv_main5_6_Int, hhv_inv_main5_7_Int; [L0] assume (hhv_inv_main16_7_Int == hbv_inv_main16_1_Int + 1 && hhv_inv_main16_5_Int == hbv_inv_main16_2_Int + -2) && 0 <= hhv_inv_main16_2_Int + -1 * hbv_inv_main16_1_Int + -1; [L0] hhv_inv_main5_0_Int, hhv_inv_main5_1_Int, hhv_inv_main5_2_Int, hhv_inv_main5_3_Int, hhv_inv_main5_4_Int, hhv_inv_main5_5_Int, hhv_inv_main5_6_Int, hhv_inv_main5_7_Int := hhv_inv_main16_0_Int, hhv_inv_main16_1_Int, hhv_inv_main16_2_Int, hhv_inv_main16_3_Int, hhv_inv_main16_4_Int, hbv_inv_main16_2_Int, hhv_inv_main16_6_Int, hbv_inv_main16_1_Int; [L0] havoc hbv_inv_main16_1_Int, hbv_inv_main16_2_Int; [L0] assume !(0 <= hhv_inv_main5_1_Int + -1 * hhv_inv_main5_6_Int + -1) && !(0 <= hhv_inv_main5_6_Int + -1 * hhv_inv_main5_1_Int + -1); [L0] hhv_inv_main9_0_Int, hhv_inv_main9_1_Int, hhv_inv_main9_2_Int, hhv_inv_main9_3_Int, hhv_inv_main9_4_Int, hhv_inv_main9_5_Int, hhv_inv_main9_6_Int, hhv_inv_main9_7_Int := hhv_inv_main5_0_Int, hhv_inv_main5_1_Int, hhv_inv_main5_2_Int, hhv_inv_main5_3_Int, hhv_inv_main5_4_Int, hhv_inv_main5_5_Int, hhv_inv_main5_6_Int, hhv_inv_main5_7_Int; [L0] RET call gotoProc(0, 0, 0, 0, 0, 0, 0, 0, 0); [L0] assert false; - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 8 locations, 1 error locations. UNSAFE Result, 1.0s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 30 SDtfs, 15 SDslu, 25 SDs, 0 SdLazy, 22 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=1, 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, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 213 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested-while_merged_unsafe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_20-52-00-434.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested-while_merged_unsafe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_20-52-00-434.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested-while_merged_unsafe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_20-52-00-434.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested-while_merged_unsafe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_20-52-00-434.csv Received shutdown request...