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/reve/024b-horn.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 21:08:19,291 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 21:08:19,293 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 21:08:19,305 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 21:08:19,305 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 21:08:19,306 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 21:08:19,309 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 21:08:19,312 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 21:08:19,313 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 21:08:19,315 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 21:08:19,315 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 21:08:19,316 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 21:08:19,316 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 21:08:19,317 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 21:08:19,321 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 21:08:19,322 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 21:08:19,323 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 21:08:19,335 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 21:08:19,339 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 21:08:19,339 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 21:08:19,340 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 21:08:19,342 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-24 21:08:19,342 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-24 21:08:19,343 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-24 21:08:19,343 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-24 21:08:19,344 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-24 21:08:19,345 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-24 21:08:19,345 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-24 21:08:19,351 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-24 21:08:19,351 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-24 21:08:19,352 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-24 21:08:19,352 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-24 21:08:19,353 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-24 21:08:19,353 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-24 21:08:19,354 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-24 21:08:19,354 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 21:08:19,378 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 21:08:19,379 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 21:08:19,379 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 21:08:19,379 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 21:08:19,383 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 21:08:19,383 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 21:08:19,383 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 21:08:19,383 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 21:08:19,384 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 21:08:19,384 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 21:08:19,384 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 21:08:19,384 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 21:08:19,384 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:08:19,384 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 21:08:19,385 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 21:08:19,385 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 21:08:19,385 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 21:08:19,385 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 21:08:19,385 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 21:08:19,385 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 21:08:19,387 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 21:08:19,388 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 21:08:19,388 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 21:08:19,439 INFO ]: Repository-Root is: /tmp [2018-06-24 21:08:19,454 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 21:08:19,457 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 21:08:19,458 INFO ]: Initializing SmtParser... [2018-06-24 21:08:19,458 INFO ]: SmtParser initialized [2018-06-24 21:08:19,459 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/reve/024b-horn.smt2 [2018-06-24 21:08:19,460 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 21:08:19,549 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/reve/024b-horn.smt2 unknown [2018-06-24 21:08:19,713 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/reve/024b-horn.smt2 [2018-06-24 21:08:19,718 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 21:08:19,726 INFO ]: Walking toolchain with 5 elements. [2018-06-24 21:08:19,726 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 21:08:19,726 INFO ]: Initializing ChcToBoogie... [2018-06-24 21:08:19,726 INFO ]: ChcToBoogie initialized [2018-06-24 21:08:19,729 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:08:19" (1/1) ... [2018-06-24 21:08:19,781 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:08:19 Unit [2018-06-24 21:08:19,781 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 21:08:19,782 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 21:08:19,782 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 21:08:19,782 INFO ]: Boogie Preprocessor initialized [2018-06-24 21:08:19,805 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:08:19" (1/1) ... [2018-06-24 21:08:19,805 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:08:19" (1/1) ... [2018-06-24 21:08:19,810 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:08:19" (1/1) ... [2018-06-24 21:08:19,810 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:08:19" (1/1) ... [2018-06-24 21:08:19,812 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:08:19" (1/1) ... [2018-06-24 21:08:19,813 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:08:19" (1/1) ... [2018-06-24 21:08:19,814 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:08:19" (1/1) ... [2018-06-24 21:08:19,815 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 21:08:19,815 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 21:08:19,815 INFO ]: Initializing RCFGBuilder... [2018-06-24 21:08:19,815 INFO ]: RCFGBuilder initialized [2018-06-24 21:08:19,815 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:08:19" (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 21:08:19,827 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 21:08:19,827 INFO ]: Found specification of procedure gotoProc [2018-06-24 21:08:19,827 INFO ]: Found implementation of procedure gotoProc [2018-06-24 21:08:19,827 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 21:08:19,828 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 21:08:19,828 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 21:08:20,108 INFO ]: Using library mode [2018-06-24 21:08:20,108 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:08:20 BoogieIcfgContainer [2018-06-24 21:08:20,108 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 21:08:20,113 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 21:08:20,113 INFO ]: Initializing BlockEncodingV2... [2018-06-24 21:08:20,115 INFO ]: BlockEncodingV2 initialized [2018-06-24 21:08:20,115 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:08:20" (1/1) ... [2018-06-24 21:08:20,144 INFO ]: Initial Icfg 12 locations, 16 edges [2018-06-24 21:08:20,145 INFO ]: Using Remove infeasible edges [2018-06-24 21:08:20,145 INFO ]: Using Maximize final states [2018-06-24 21:08:20,150 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 21:08:20,150 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 21:08:20,152 INFO ]: Using Remove sink states [2018-06-24 21:08:20,153 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 21:08:20,153 INFO ]: Using Use SBE [2018-06-24 21:08:20,158 INFO ]: SBE split 0 edges [2018-06-24 21:08:20,165 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-24 21:08:20,166 INFO ]: 0 new accepting states [2018-06-24 21:08:20,195 INFO ]: Removed 6 edges and 2 locations by large block encoding [2018-06-24 21:08:20,197 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:08:20,201 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 21:08:20,201 INFO ]: 0 new accepting states [2018-06-24 21:08:20,201 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 21:08:20,202 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:08:20,202 INFO ]: Encoded RCFG 8 locations, 12 edges [2018-06-24 21:08:20,203 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:08:20 BasicIcfg [2018-06-24 21:08:20,203 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 21:08:20,208 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 21:08:20,208 INFO ]: Initializing TraceAbstraction... [2018-06-24 21:08:20,211 INFO ]: TraceAbstraction initialized [2018-06-24 21:08:20,211 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:08:19" (1/4) ... [2018-06-24 21:08:20,212 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8ddc3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 09:08:20, skipping insertion in model container [2018-06-24 21:08:20,213 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:08:19" (2/4) ... [2018-06-24 21:08:20,213 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8ddc3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 09:08:20, skipping insertion in model container [2018-06-24 21:08:20,213 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:08:20" (3/4) ... [2018-06-24 21:08:20,213 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8ddc3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:08:20, skipping insertion in model container [2018-06-24 21:08:20,213 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:08:20" (4/4) ... [2018-06-24 21:08:20,215 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 21:08:20,224 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 21:08:20,234 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 21:08:20,271 INFO ]: Using default assertion order modulation [2018-06-24 21:08:20,271 INFO ]: Interprodecural is true [2018-06-24 21:08:20,271 INFO ]: Hoare is false [2018-06-24 21:08:20,271 INFO ]: Compute interpolants for FPandBP [2018-06-24 21:08:20,272 INFO ]: Backedges is TWOTRACK [2018-06-24 21:08:20,272 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 21:08:20,272 INFO ]: Difference is false [2018-06-24 21:08:20,272 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 21:08:20,272 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 21:08:20,281 INFO ]: Start isEmpty. Operand 8 states. [2018-06-24 21:08:20,290 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:08:20,290 INFO ]: Found error trace [2018-06-24 21:08:20,291 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:08:20,291 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:08:20,299 INFO ]: Analyzing trace with hash 41130314, now seen corresponding path program 1 times [2018-06-24 21:08:20,301 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:08:20,301 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:08:20,338 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:20,338 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:08:20,338 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:20,380 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:20,552 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-06-24 21:08:20,555 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:08:20,557 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:08:20,557 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:08:20,558 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:08:20,569 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:08:20,570 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:08:20,572 INFO ]: Start difference. First operand 8 states. Second operand 3 states. [2018-06-24 21:08:20,693 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:08:20,693 INFO ]: Finished difference Result 12 states and 20 transitions. [2018-06-24 21:08:20,694 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:08:20,695 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:08:20,696 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:08:20,706 INFO ]: With dead ends: 12 [2018-06-24 21:08:20,706 INFO ]: Without dead ends: 12 [2018-06-24 21:08:20,709 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:08:20,727 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-24 21:08:20,757 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 9. [2018-06-24 21:08:20,758 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-24 21:08:20,759 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 15 transitions. [2018-06-24 21:08:20,764 INFO ]: Start accepts. Automaton has 9 states and 15 transitions. Word has length 5 [2018-06-24 21:08:20,764 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:08:20,764 INFO ]: Abstraction has 9 states and 15 transitions. [2018-06-24 21:08:20,764 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:08:20,765 INFO ]: Start isEmpty. Operand 9 states and 15 transitions. [2018-06-24 21:08:20,765 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:08:20,765 INFO ]: Found error trace [2018-06-24 21:08:20,765 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:08:20,765 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:08:20,765 INFO ]: Analyzing trace with hash 1274567087, now seen corresponding path program 1 times [2018-06-24 21:08:20,765 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:08:20,765 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:08:20,766 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:20,766 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:08:20,766 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:20,784 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:21,072 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 11 [2018-06-24 21:08:21,214 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:08:21,214 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:08:21,214 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 [2018-06-24 21:08:21,232 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:08:21,268 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:21,276 INFO ]: Computing forward predicates... [2018-06-24 21:08:21,347 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:08:21,368 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:08:21,368 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-24 21:08:21,369 INFO ]: Interpolant automaton has 5 states [2018-06-24 21:08:21,369 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-24 21:08:21,369 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-24 21:08:21,369 INFO ]: Start difference. First operand 9 states and 15 transitions. Second operand 5 states. [2018-06-24 21:08:21,463 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:08:21,463 INFO ]: Finished difference Result 13 states and 21 transitions. [2018-06-24 21:08:21,464 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-24 21:08:21,464 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-24 21:08:21,464 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:08:21,464 INFO ]: With dead ends: 13 [2018-06-24 21:08:21,464 INFO ]: Without dead ends: 13 [2018-06-24 21:08:21,465 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-24 21:08:21,465 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-24 21:08:21,467 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 10. [2018-06-24 21:08:21,467 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-24 21:08:21,468 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 16 transitions. [2018-06-24 21:08:21,468 INFO ]: Start accepts. Automaton has 10 states and 16 transitions. Word has length 6 [2018-06-24 21:08:21,468 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:08:21,468 INFO ]: Abstraction has 10 states and 16 transitions. [2018-06-24 21:08:21,468 INFO ]: Interpolant automaton has 5 states. [2018-06-24 21:08:21,468 INFO ]: Start isEmpty. Operand 10 states and 16 transitions. [2018-06-24 21:08:21,468 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-24 21:08:21,468 INFO ]: Found error trace [2018-06-24 21:08:21,468 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-24 21:08:21,468 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:08:21,469 INFO ]: Analyzing trace with hash 856401386, now seen corresponding path program 2 times [2018-06-24 21:08:21,469 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:08:21,469 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:08:21,470 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:21,470 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:08:21,470 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:21,491 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:21,711 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:08:21,711 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:08:21,711 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 [2018-06-24 21:08:21,718 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:08:21,759 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:08:21,759 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:21,762 INFO ]: Computing forward predicates... [2018-06-24 21:08:21,955 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:08:21,975 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:08:21,975 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-06-24 21:08:21,975 INFO ]: Interpolant automaton has 7 states [2018-06-24 21:08:21,975 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-24 21:08:21,975 INFO ]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-24 21:08:21,976 INFO ]: Start difference. First operand 10 states and 16 transitions. Second operand 7 states. [2018-06-24 21:08:22,157 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:08:22,157 INFO ]: Finished difference Result 18 states and 30 transitions. [2018-06-24 21:08:22,158 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-24 21:08:22,158 INFO ]: Start accepts. Automaton has 7 states. Word has length 7 [2018-06-24 21:08:22,158 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:08:22,159 INFO ]: With dead ends: 18 [2018-06-24 21:08:22,159 INFO ]: Without dead ends: 18 [2018-06-24 21:08:22,159 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-06-24 21:08:22,159 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-24 21:08:22,161 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-06-24 21:08:22,162 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-24 21:08:22,162 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 20 transitions. [2018-06-24 21:08:22,162 INFO ]: Start accepts. Automaton has 12 states and 20 transitions. Word has length 7 [2018-06-24 21:08:22,162 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:08:22,162 INFO ]: Abstraction has 12 states and 20 transitions. [2018-06-24 21:08:22,162 INFO ]: Interpolant automaton has 7 states. [2018-06-24 21:08:22,162 INFO ]: Start isEmpty. Operand 12 states and 20 transitions. [2018-06-24 21:08:22,163 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-24 21:08:22,163 INFO ]: Found error trace [2018-06-24 21:08:22,163 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-06-24 21:08:22,163 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:08:22,163 INFO ]: Analyzing trace with hash 778195373, now seen corresponding path program 1 times [2018-06-24 21:08:22,163 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:08:22,163 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:08:22,164 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:22,164 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:08:22,164 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:22,176 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:22,237 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:08:22,237 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:08:22,238 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 [2018-06-24 21:08:22,244 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:08:22,273 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:22,275 INFO ]: Computing forward predicates... [2018-06-24 21:08:22,282 INFO ]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-24 21:08:22,315 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-24 21:08:22,315 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2018-06-24 21:08:22,315 INFO ]: Interpolant automaton has 4 states [2018-06-24 21:08:22,315 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-24 21:08:22,316 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:08:22,316 INFO ]: Start difference. First operand 12 states and 20 transitions. Second operand 4 states. [2018-06-24 21:08:22,327 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:08:22,327 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-24 21:08:22,328 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:08:22,328 INFO ]: Start accepts. Automaton has 4 states. Word has length 8 [2018-06-24 21:08:22,328 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:08:22,328 INFO ]: With dead ends: 10 [2018-06-24 21:08:22,328 INFO ]: Without dead ends: 10 [2018-06-24 21:08:22,328 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:08:22,328 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-24 21:08:22,329 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-24 21:08:22,330 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-24 21:08:22,330 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-24 21:08:22,330 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-24 21:08:22,330 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:08:22,330 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-24 21:08:22,330 INFO ]: Interpolant automaton has 4 states. [2018-06-24 21:08:22,330 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-24 21:08:22,330 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-24 21:08:22,330 INFO ]: Found error trace [2018-06-24 21:08:22,330 INFO ]: trace histogram [4, 1, 1, 1, 1, 1] [2018-06-24 21:08:22,330 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:08:22,331 INFO ]: Analyzing trace with hash -1647113590, now seen corresponding path program 3 times [2018-06-24 21:08:22,331 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:08:22,331 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:08:22,331 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:22,331 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:08:22,331 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:22,375 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:22,848 WARN ]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-24 21:08:22,849 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:08:22,849 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:08:22,849 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-24 21:08:22,864 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:08:22,931 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-24 21:08:22,931 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:22,934 INFO ]: Computing forward predicates... [2018-06-24 21:08:23,682 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:08:23,702 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:08:23,702 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-06-24 21:08:23,702 INFO ]: Interpolant automaton has 11 states [2018-06-24 21:08:23,703 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-24 21:08:23,703 INFO ]: CoverageRelationStatistics Valid=32, Invalid=77, Unknown=1, NotChecked=0, Total=110 [2018-06-24 21:08:23,704 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 11 states. [2018-06-24 21:08:24,082 WARN ]: Spent 361.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2018-06-24 21:08:26,691 WARN ]: Spent 790.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-06-24 21:08:26,767 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:08:26,767 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-24 21:08:26,767 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-24 21:08:26,767 INFO ]: Start accepts. Automaton has 11 states. Word has length 9 [2018-06-24 21:08:26,767 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:08:26,767 INFO ]: With dead ends: 13 [2018-06-24 21:08:26,767 INFO ]: Without dead ends: 13 [2018-06-24 21:08:26,768 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=74, Invalid=165, Unknown=1, NotChecked=0, Total=240 [2018-06-24 21:08:26,768 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-24 21:08:26,769 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-24 21:08:26,769 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-24 21:08:26,770 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-24 21:08:26,770 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 9 [2018-06-24 21:08:26,770 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:08:26,770 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-24 21:08:26,770 INFO ]: Interpolant automaton has 11 states. [2018-06-24 21:08:26,770 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-24 21:08:26,770 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-24 21:08:26,770 INFO ]: Found error trace [2018-06-24 21:08:26,770 INFO ]: trace histogram [7, 1, 1, 1, 1, 1] [2018-06-24 21:08:26,770 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:08:26,770 INFO ]: Analyzing trace with hash 371058639, now seen corresponding path program 4 times [2018-06-24 21:08:26,770 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:08:26,770 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:08:26,771 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:26,771 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:08:26,771 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:26,818 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:27,039 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:08:27,040 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:08:27,040 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:08:27,054 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-24 21:08:27,084 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-24 21:08:27,084 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:27,089 INFO ]: Computing forward predicates... [2018-06-24 21:08:27,688 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:08:27,723 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:08:27,723 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-24 21:08:27,723 INFO ]: Interpolant automaton has 17 states [2018-06-24 21:08:27,723 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-24 21:08:27,723 INFO ]: CoverageRelationStatistics Valid=81, Invalid=190, Unknown=1, NotChecked=0, Total=272 [2018-06-24 21:08:27,724 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 17 states. [2018-06-24 21:08:28,163 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:08:28,163 INFO ]: Finished difference Result 20 states and 20 transitions. [2018-06-24 21:08:28,163 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-24 21:08:28,164 INFO ]: Start accepts. Automaton has 17 states. Word has length 12 [2018-06-24 21:08:28,164 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:08:28,164 INFO ]: With dead ends: 20 [2018-06-24 21:08:28,164 INFO ]: Without dead ends: 20 [2018-06-24 21:08:28,165 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=188, Invalid=363, Unknown=1, NotChecked=0, Total=552 [2018-06-24 21:08:28,165 INFO ]: Start minimizeSevpa. Operand 20 states. [2018-06-24 21:08:28,166 INFO ]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-06-24 21:08:28,167 INFO ]: Start removeUnreachable. Operand 20 states. [2018-06-24 21:08:28,167 INFO ]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-06-24 21:08:28,167 INFO ]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 12 [2018-06-24 21:08:28,167 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:08:28,167 INFO ]: Abstraction has 20 states and 20 transitions. [2018-06-24 21:08:28,167 INFO ]: Interpolant automaton has 17 states. [2018-06-24 21:08:28,167 INFO ]: Start isEmpty. Operand 20 states and 20 transitions. [2018-06-24 21:08:28,168 INFO ]: Finished isEmpty. Found accepting run of length 20 [2018-06-24 21:08:28,168 INFO ]: Found error trace [2018-06-24 21:08:28,168 INFO ]: trace histogram [14, 1, 1, 1, 1, 1] [2018-06-24 21:08:28,168 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:08:28,168 INFO ]: Analyzing trace with hash 47983018, now seen corresponding path program 5 times [2018-06-24 21:08:28,168 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:08:28,168 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:08:28,169 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:28,169 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:08:28,169 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:28,221 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:28,479 WARN ]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-24 21:08:28,781 INFO ]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:08:28,781 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:08:28,781 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-24 21:08:28,796 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:08:28,908 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-06-24 21:08:28,908 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:28,916 INFO ]: Computing forward predicates... [2018-06-24 21:08:29,405 INFO ]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:08:29,426 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:08:29,426 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-06-24 21:08:29,426 INFO ]: Interpolant automaton has 32 states [2018-06-24 21:08:29,426 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-24 21:08:29,427 INFO ]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2018-06-24 21:08:29,427 INFO ]: Start difference. First operand 20 states and 20 transitions. Second operand 32 states. [2018-06-24 21:08:31,015 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:08:31,015 INFO ]: Finished difference Result 21 states and 21 transitions. [2018-06-24 21:08:31,015 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-24 21:08:31,015 INFO ]: Start accepts. Automaton has 32 states. Word has length 19 [2018-06-24 21:08:31,015 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:08:31,015 INFO ]: With dead ends: 21 [2018-06-24 21:08:31,015 INFO ]: Without dead ends: 21 [2018-06-24 21:08:31,016 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2018-06-24 21:08:31,016 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-24 21:08:31,018 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-24 21:08:31,018 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-24 21:08:31,018 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-06-24 21:08:31,018 INFO ]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-06-24 21:08:31,018 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:08:31,018 INFO ]: Abstraction has 21 states and 21 transitions. [2018-06-24 21:08:31,019 INFO ]: Interpolant automaton has 32 states. [2018-06-24 21:08:31,019 INFO ]: Start isEmpty. Operand 21 states and 21 transitions. [2018-06-24 21:08:31,019 INFO ]: Finished isEmpty. Found accepting run of length 21 [2018-06-24 21:08:31,019 INFO ]: Found error trace [2018-06-24 21:08:31,019 INFO ]: trace histogram [15, 1, 1, 1, 1, 1] [2018-06-24 21:08:31,019 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:08:31,019 INFO ]: Analyzing trace with hash 1487000911, now seen corresponding path program 6 times [2018-06-24 21:08:31,019 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:08:31,019 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:08:31,020 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:31,020 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:08:31,020 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:08:31,065 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:31,380 INFO ]: Checked inductivity of 120 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-06-24 21:08:31,380 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:08:31,380 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:08:31,387 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-24 21:08:31,447 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-06-24 21:08:31,447 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:08:31,454 INFO ]: Computing forward predicates... [2018-06-24 21:08:32,539 INFO ]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:08:32,558 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:08:32,558 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18] total 21 [2018-06-24 21:08:32,558 INFO ]: Interpolant automaton has 21 states [2018-06-24 21:08:32,558 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-24 21:08:32,558 INFO ]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2018-06-24 21:08:32,558 INFO ]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-06-24 21:08:34,068 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:08:34,068 INFO ]: Finished difference Result 19 states and 19 transitions. [2018-06-24 21:08:34,069 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-24 21:08:34,069 INFO ]: Start accepts. Automaton has 21 states. Word has length 20 [2018-06-24 21:08:34,069 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:08:34,069 INFO ]: With dead ends: 19 [2018-06-24 21:08:34,069 INFO ]: Without dead ends: 0 [2018-06-24 21:08:34,070 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=102, Invalid=497, Unknown=1, NotChecked=0, Total=600 [2018-06-24 21:08:34,070 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-24 21:08:34,070 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-24 21:08:34,070 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-24 21:08:34,070 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-24 21:08:34,070 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-06-24 21:08:34,070 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:08:34,070 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-24 21:08:34,070 INFO ]: Interpolant automaton has 21 states. [2018-06-24 21:08:34,070 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-24 21:08:34,070 INFO ]: Finished isEmpty. No accepting run. [2018-06-24 21:08:34,072 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 21:08:34,073 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:08:34 BasicIcfg [2018-06-24 21:08:34,073 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 21:08:34,074 INFO ]: Toolchain (without parser) took 14355.71 ms. Allocated memory was 305.1 MB in the beginning and 409.5 MB in the end (delta: 104.3 MB). Free memory was 261.7 MB in the beginning and 361.6 MB in the end (delta: -99.9 MB). Peak memory consumption was 4.4 MB. Max. memory is 3.6 GB. [2018-06-24 21:08:34,075 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 305.1 MB. Free memory is still 270.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:08:34,075 INFO ]: ChcToBoogie took 55.38 ms. Allocated memory is still 305.1 MB. Free memory was 260.6 MB in the beginning and 258.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:08:34,075 INFO ]: Boogie Preprocessor took 32.69 ms. Allocated memory is still 305.1 MB. Free memory was 258.7 MB in the beginning and 257.7 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. [2018-06-24 21:08:34,076 INFO ]: RCFGBuilder took 293.46 ms. Allocated memory is still 305.1 MB. Free memory was 257.7 MB in the beginning and 248.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 3.6 GB. [2018-06-24 21:08:34,076 INFO ]: BlockEncodingV2 took 89.38 ms. Allocated memory is still 305.1 MB. Free memory was 248.6 MB in the beginning and 246.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:08:34,077 INFO ]: TraceAbstraction took 13865.06 ms. Allocated memory was 305.1 MB in the beginning and 409.5 MB in the end (delta: 104.3 MB). Free memory was 245.6 MB in the beginning and 361.6 MB in the end (delta: -116.0 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:08:34,080 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 12 locations, 16 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 305.1 MB. Free memory is still 270.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 55.38 ms. Allocated memory is still 305.1 MB. Free memory was 260.6 MB in the beginning and 258.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 32.69 ms. Allocated memory is still 305.1 MB. Free memory was 258.7 MB in the beginning and 257.7 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. * RCFGBuilder took 293.46 ms. Allocated memory is still 305.1 MB. Free memory was 257.7 MB in the beginning and 248.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 89.38 ms. Allocated memory is still 305.1 MB. Free memory was 248.6 MB in the beginning and 246.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 13865.06 ms. Allocated memory was 305.1 MB in the beginning and 409.5 MB in the end (delta: 104.3 MB). Free memory was 245.6 MB in the beginning and 361.6 MB in the end (delta: -116.0 MB). There was no memory consumed. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 8 locations, 1 error locations. SAFE Result, 13.8s OverallTime, 8 OverallIterations, 15 TraceHistogramMax, 7.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 50 SDtfs, 31 SDslu, 202 SDs, 0 SdLazy, 815 SolverSat, 46 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 42 SyntacticMatches, 17 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=7, 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, 8 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 167 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 152 ConstructedInterpolants, 9 QuantifiedInterpolants, 25935 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1196 ConjunctsInSsa, 855 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 82/540 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/024b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_21-08-34-092.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/024b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_21-08-34-092.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/024b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_21-08-34-092.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/024b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_21-08-34-092.csv Received shutdown request...