java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/llreve-bench/smt2/loop__bug15.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 09:53:47,344 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 09:53:47,346 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 09:53:47,357 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 09:53:47,357 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 09:53:47,358 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 09:53:47,359 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 09:53:47,361 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 09:53:47,362 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 09:53:47,363 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 09:53:47,364 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 09:53:47,364 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 09:53:47,365 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 09:53:47,366 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 09:53:47,367 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 09:53:47,368 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 09:53:47,369 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 09:53:47,371 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 09:53:47,373 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 09:53:47,374 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 09:53:47,375 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 09:53:47,378 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 09:53:47,378 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 09:53:47,378 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 09:53:47,379 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 09:53:47,380 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 09:53:47,381 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 09:53:47,382 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 09:53:47,383 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 09:53:47,383 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 09:53:47,384 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 09:53:47,385 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 09:53:47,385 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 09:53:47,386 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 09:53:47,386 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 09:53:47,387 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 09:53:47,453 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 09:53:47,454 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 09:53:47,457 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 09:53:47,457 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 09:53:47,458 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 09:53:47,459 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 09:53:47,459 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 09:53:47,459 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 09:53:47,459 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 09:53:47,459 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 09:53:47,460 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 09:53:47,460 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 09:53:47,460 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 09:53:47,460 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 09:53:47,460 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 09:53:47,463 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 09:53:47,463 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 09:53:47,463 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 09:53:47,464 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 09:53:47,464 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 09:53:47,464 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 09:53:47,465 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 09:53:47,465 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 09:53:47,515 INFO ]: Repository-Root is: /tmp [2018-06-25 09:53:47,530 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 09:53:47,535 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 09:53:47,536 INFO ]: Initializing SmtParser... [2018-06-25 09:53:47,536 INFO ]: SmtParser initialized [2018-06-25 09:53:47,537 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/loop__bug15.smt2 [2018-06-25 09:53:47,538 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-25 09:53:47,623 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/loop__bug15.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@66e82d5f [2018-06-25 09:53:47,758 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/loop__bug15.smt2 [2018-06-25 09:53:47,763 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 09:53:47,771 INFO ]: Walking toolchain with 4 elements. [2018-06-25 09:53:47,771 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 09:53:47,771 INFO ]: Initializing ChcToBoogie... [2018-06-25 09:53:47,772 INFO ]: ChcToBoogie initialized [2018-06-25 09:53:47,775 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 09:53:47" (1/1) ... [2018-06-25 09:53:47,831 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:53:47 Unit [2018-06-25 09:53:47,867 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 09:53:47,868 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 09:53:47,868 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 09:53:47,868 INFO ]: Boogie Preprocessor initialized [2018-06-25 09:53:47,890 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:53:47" (1/1) ... [2018-06-25 09:53:47,890 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:53:47" (1/1) ... [2018-06-25 09:53:47,896 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:53:47" (1/1) ... [2018-06-25 09:53:47,896 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:53:47" (1/1) ... [2018-06-25 09:53:47,900 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:53:47" (1/1) ... [2018-06-25 09:53:47,902 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:53:47" (1/1) ... [2018-06-25 09:53:47,903 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:53:47" (1/1) ... [2018-06-25 09:53:47,904 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 09:53:47,906 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 09:53:47,906 INFO ]: Initializing RCFGBuilder... [2018-06-25 09:53:47,906 INFO ]: RCFGBuilder initialized [2018-06-25 09:53:47,907 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:53:47" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-25 09:53:47,929 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 09:53:47,929 INFO ]: Found specification of procedure gotoProc [2018-06-25 09:53:47,929 INFO ]: Found implementation of procedure gotoProc [2018-06-25 09:53:47,929 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 09:53:47,929 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 09:53:47,929 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 09:53:48,066 INFO ]: Using library mode [2018-06-25 09:53:48,067 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 09:53:48 BoogieIcfgContainer [2018-06-25 09:53:48,067 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 09:53:48,068 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 09:53:48,068 INFO ]: Initializing TraceAbstraction... [2018-06-25 09:53:48,071 INFO ]: TraceAbstraction initialized [2018-06-25 09:53:48,071 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 09:53:47" (1/3) ... [2018-06-25 09:53:48,072 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d917bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 09:53:48, skipping insertion in model container [2018-06-25 09:53:48,072 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:53:47" (2/3) ... [2018-06-25 09:53:48,072 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d917bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 09:53:48, skipping insertion in model container [2018-06-25 09:53:48,072 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 09:53:48" (3/3) ... [2018-06-25 09:53:48,074 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 09:53:48,083 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 09:53:48,097 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 09:53:48,145 INFO ]: Using default assertion order modulation [2018-06-25 09:53:48,146 INFO ]: Interprodecural is true [2018-06-25 09:53:48,146 INFO ]: Hoare is false [2018-06-25 09:53:48,146 INFO ]: Compute interpolants for FPandBP [2018-06-25 09:53:48,146 INFO ]: Backedges is TWOTRACK [2018-06-25 09:53:48,146 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 09:53:48,146 INFO ]: Difference is false [2018-06-25 09:53:48,146 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 09:53:48,146 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 09:53:48,165 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 09:53:48,177 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 09:53:48,177 INFO ]: Found error trace [2018-06-25 09:53:48,178 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 09:53:48,178 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:53:48,183 INFO ]: Analyzing trace with hash 1775152532, now seen corresponding path program 1 times [2018-06-25 09:53:48,185 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:53:48,185 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:53:48,221 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:53:48,221 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:53:48,221 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:53:48,243 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:53:48,271 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:53:48,279 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 09:53:48,279 INFO ]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-06-25 09:53:48,280 INFO ]: Interpolant automaton has 2 states [2018-06-25 09:53:48,291 INFO ]: Constructing interpolant automaton starting with 2 interpolants. [2018-06-25 09:53:48,291 INFO ]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-25 09:53:48,294 INFO ]: Start difference. First operand 10 states. Second operand 2 states. [2018-06-25 09:53:48,310 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:53:48,311 INFO ]: Finished difference Result 8 states and 10 transitions. [2018-06-25 09:53:48,311 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-06-25 09:53:48,312 INFO ]: Start accepts. Automaton has 2 states. Word has length 6 [2018-06-25 09:53:48,312 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:53:48,326 INFO ]: With dead ends: 8 [2018-06-25 09:53:48,327 INFO ]: Without dead ends: 8 [2018-06-25 09:53:48,329 INFO ]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-25 09:53:48,355 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-25 09:53:48,367 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-06-25 09:53:48,368 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 09:53:48,368 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-06-25 09:53:48,369 INFO ]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 6 [2018-06-25 09:53:48,369 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:53:48,369 INFO ]: Abstraction has 8 states and 10 transitions. [2018-06-25 09:53:48,369 INFO ]: Interpolant automaton has 2 states. [2018-06-25 09:53:48,369 INFO ]: Start isEmpty. Operand 8 states and 10 transitions. [2018-06-25 09:53:48,370 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 09:53:48,370 INFO ]: Found error trace [2018-06-25 09:53:48,370 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:53:48,370 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:53:48,370 INFO ]: Analyzing trace with hash -798595860, now seen corresponding path program 1 times [2018-06-25 09:53:48,370 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:53:48,370 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:53:48,371 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:53:48,371 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:53:48,371 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:53:48,379 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:53:48,438 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:53:48,438 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 09:53:48,438 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 09:53:48,440 INFO ]: Interpolant automaton has 3 states [2018-06-25 09:53:48,440 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 09:53:48,440 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 09:53:48,440 INFO ]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-06-25 09:53:48,522 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:53:48,523 INFO ]: Finished difference Result 9 states and 13 transitions. [2018-06-25 09:53:48,523 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 09:53:48,523 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 09:53:48,523 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:53:48,523 INFO ]: With dead ends: 9 [2018-06-25 09:53:48,524 INFO ]: Without dead ends: 9 [2018-06-25 09:53:48,524 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 09:53:48,524 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 09:53:48,526 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 09:53:48,526 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 09:53:48,526 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2018-06-25 09:53:48,526 INFO ]: Start accepts. Automaton has 9 states and 13 transitions. Word has length 7 [2018-06-25 09:53:48,527 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:53:48,527 INFO ]: Abstraction has 9 states and 13 transitions. [2018-06-25 09:53:48,527 INFO ]: Interpolant automaton has 3 states. [2018-06-25 09:53:48,528 INFO ]: Start isEmpty. Operand 9 states and 13 transitions. [2018-06-25 09:53:48,528 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 09:53:48,528 INFO ]: Found error trace [2018-06-25 09:53:48,528 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:53:48,528 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:53:48,528 INFO ]: Analyzing trace with hash 1015888528, now seen corresponding path program 1 times [2018-06-25 09:53:48,528 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:53:48,528 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:53:48,529 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:53:48,529 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:53:48,529 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:53:48,539 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:53:48,626 INFO ]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-25 09:53:48,626 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 09:53:48,626 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 09:53:48,626 INFO ]: Interpolant automaton has 3 states [2018-06-25 09:53:48,626 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 09:53:48,626 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 09:53:48,627 INFO ]: Start difference. First operand 9 states and 13 transitions. Second operand 3 states. [2018-06-25 09:53:48,677 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:53:48,677 INFO ]: Finished difference Result 5 states and 9 transitions. [2018-06-25 09:53:48,677 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 09:53:48,677 INFO ]: Start accepts. Automaton has 3 states. Word has length 8 [2018-06-25 09:53:48,677 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:53:48,677 INFO ]: With dead ends: 5 [2018-06-25 09:53:48,677 INFO ]: Without dead ends: 0 [2018-06-25 09:53:48,677 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 09:53:48,678 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-25 09:53:48,678 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-25 09:53:48,678 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-25 09:53:48,678 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-25 09:53:48,678 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2018-06-25 09:53:48,678 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:53:48,678 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-25 09:53:48,678 INFO ]: Interpolant automaton has 3 states. [2018-06-25 09:53:48,678 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-25 09:53:48,678 INFO ]: Finished isEmpty. No accepting run. [2018-06-25 09:53:48,682 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 09:53:48 BoogieIcfgContainer [2018-06-25 09:53:48,682 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 09:53:48,683 INFO ]: Toolchain (without parser) took 919.34 ms. Allocated memory is still 306.7 MB. Free memory was 263.1 MB in the beginning and 234.1 MB in the end (delta: 29.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:53:48,684 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 09:53:48,684 INFO ]: ChcToBoogie took 95.98 ms. Allocated memory is still 306.7 MB. Free memory was 263.1 MB in the beginning and 261.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:53:48,685 INFO ]: Boogie Preprocessor took 36.73 ms. Allocated memory is still 306.7 MB. Free memory was 261.1 MB in the beginning and 260.1 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. [2018-06-25 09:53:48,686 INFO ]: RCFGBuilder took 161.26 ms. Allocated memory is still 306.7 MB. Free memory was 260.1 MB in the beginning and 253.1 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:53:48,687 INFO ]: TraceAbstraction took 614.38 ms. Allocated memory is still 306.7 MB. Free memory was 253.1 MB in the beginning and 234.1 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 3.6 GB. [2018-06-25 09:53:48,690 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 95.98 ms. Allocated memory is still 306.7 MB. Free memory was 263.1 MB in the beginning and 261.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 36.73 ms. Allocated memory is still 306.7 MB. Free memory was 261.1 MB in the beginning and 260.1 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. * RCFGBuilder took 161.26 ms. Allocated memory is still 306.7 MB. Free memory was 260.1 MB in the beginning and 253.1 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 614.38 ms. Allocated memory is still 306.7 MB. Free memory was 253.1 MB in the beginning and 234.1 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. 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, 10 locations, 1 error locations. SAFE Result, 0.5s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 20 SDtfs, 0 SDslu, 7 SDs, 0 SdLazy, 9 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 262 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 correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__bug15.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_09-53-48-702.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__bug15.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_09-53-48-702.csv Received shutdown request...