java -Xss1g -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/faulty__nested-while!.smt2' -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 02:09:25,578 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 02:09:25,581 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 02:09:25,593 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 02:09:25,594 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 02:09:25,594 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 02:09:25,595 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 02:09:25,598 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 02:09:25,599 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 02:09:25,600 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 02:09:25,600 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 02:09:25,601 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 02:09:25,601 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 02:09:25,603 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 02:09:25,603 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 02:09:25,604 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 02:09:25,608 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 02:09:25,610 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 02:09:25,619 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 02:09:25,620 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 02:09:25,621 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 02:09:25,623 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 02:09:25,624 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 02:09:25,624 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 02:09:25,624 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 02:09:25,625 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 02:09:25,626 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 02:09:25,626 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 02:09:25,627 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 02:09:25,628 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 02:09:25,632 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 02:09:25,633 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 02:09:25,633 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 02:09:25,633 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 02:09:25,634 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 02:09:25,634 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 02:09:25,652 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 02:09:25,653 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 02:09:25,653 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 02:09:25,653 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 02:09:25,655 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 02:09:25,655 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 02:09:25,655 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 02:09:25,656 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 02:09:25,656 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 02:09:25,656 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 02:09:25,656 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 02:09:25,656 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 02:09:25,656 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 02:09:25,657 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 02:09:25,657 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 02:09:25,657 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 02:09:25,657 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 02:09:25,659 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 02:09:25,659 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 02:09:25,705 INFO ]: Repository-Root is: /tmp [2018-06-22 02:09:25,719 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 02:09:25,724 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 02:09:25,725 INFO ]: Initializing SmtParser... [2018-06-22 02:09:25,726 INFO ]: SmtParser initialized [2018-06-22 02:09:25,726 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/faulty__nested-while!.smt2 [2018-06-22 02:09:25,728 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 [2018-06-22 02:09:25,816 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/faulty__nested-while!.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@6d0cc5fa [2018-06-22 02:09:25,996 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/faulty__nested-while!.smt2 [2018-06-22 02:09:26,001 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 02:09:26,012 INFO ]: Walking toolchain with 4 elements. [2018-06-22 02:09:26,013 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 02:09:26,013 INFO ]: Initializing ChcToBoogie... [2018-06-22 02:09:26,013 INFO ]: ChcToBoogie initialized [2018-06-22 02:09:26,016 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:09:25" (1/1) ... [2018-06-22 02:09:26,080 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:09:26 Unit [2018-06-22 02:09:26,080 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 02:09:26,081 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 02:09:26,081 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 02:09:26,081 INFO ]: Boogie Preprocessor initialized [2018-06-22 02:09:26,106 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:09:26" (1/1) ... [2018-06-22 02:09:26,106 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:09:26" (1/1) ... [2018-06-22 02:09:26,113 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:09:26" (1/1) ... [2018-06-22 02:09:26,113 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:09:26" (1/1) ... [2018-06-22 02:09:26,117 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:09:26" (1/1) ... [2018-06-22 02:09:26,120 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:09:26" (1/1) ... [2018-06-22 02:09:26,121 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:09:26" (1/1) ... [2018-06-22 02:09:26,122 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 02:09:26,126 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 02:09:26,126 INFO ]: Initializing RCFGBuilder... [2018-06-22 02:09:26,127 INFO ]: RCFGBuilder initialized [2018-06-22 02:09:26,128 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:09:26" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 02:09:26,143 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 02:09:26,144 INFO ]: Found specification of procedure gotoProc [2018-06-22 02:09:26,144 INFO ]: Found implementation of procedure gotoProc [2018-06-22 02:09:26,144 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 02:09:26,144 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 02:09:26,144 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 02:09:26,420 INFO ]: Using library mode [2018-06-22 02:09:26,423 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:09:26 BoogieIcfgContainer [2018-06-22 02:09:26,423 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 02:09:26,425 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 02:09:26,425 INFO ]: Initializing TraceAbstraction... [2018-06-22 02:09:26,432 INFO ]: TraceAbstraction initialized [2018-06-22 02:09:26,432 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:09:25" (1/3) ... [2018-06-22 02:09:26,434 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294555d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:09:26, skipping insertion in model container [2018-06-22 02:09:26,434 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:09:26" (2/3) ... [2018-06-22 02:09:26,434 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294555d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:09:26, skipping insertion in model container [2018-06-22 02:09:26,434 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:09:26" (3/3) ... [2018-06-22 02:09:26,436 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 02:09:26,445 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 02:09:26,453 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 02:09:26,492 INFO ]: Using default assertion order modulation [2018-06-22 02:09:26,493 INFO ]: Interprodecural is true [2018-06-22 02:09:26,493 INFO ]: Hoare is false [2018-06-22 02:09:26,493 INFO ]: Compute interpolants for FPandBP [2018-06-22 02:09:26,493 INFO ]: Backedges is TWOTRACK [2018-06-22 02:09:26,493 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 02:09:26,493 INFO ]: Difference is false [2018-06-22 02:09:26,493 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 02:09:26,493 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 02:09:26,517 INFO ]: Start isEmpty. Operand 11 states. [2018-06-22 02:09:26,533 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 02:09:26,533 INFO ]: Found error trace [2018-06-22 02:09:26,534 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:09:26,534 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:09:26,540 INFO ]: Analyzing trace with hash -662593806, now seen corresponding path program 1 times [2018-06-22 02:09:26,543 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:09:26,543 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:09:26,586 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:09:26,587 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:09:26,587 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:09:26,636 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:09:26,758 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:09:26,760 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 02:09:26,760 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 02:09:26,761 INFO ]: Interpolant automaton has 3 states [2018-06-22 02:09:26,772 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 02:09:26,773 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 02:09:26,774 INFO ]: Start difference. First operand 11 states. Second operand 3 states. [2018-06-22 02:09:26,851 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:09:26,851 INFO ]: Finished difference Result 11 states and 19 transitions. [2018-06-22 02:09:26,851 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 02:09:26,853 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 02:09:26,853 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:09:26,861 INFO ]: With dead ends: 11 [2018-06-22 02:09:26,861 INFO ]: Without dead ends: 11 [2018-06-22 02:09:26,863 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 [2018-06-22 02:09:26,883 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 02:09:26,904 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-06-22 02:09:26,906 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 02:09:26,906 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2018-06-22 02:09:26,907 INFO ]: Start accepts. Automaton has 10 states and 15 transitions. Word has length 7 [2018-06-22 02:09:26,908 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:09:26,908 INFO ]: Abstraction has 10 states and 15 transitions. [2018-06-22 02:09:26,908 INFO ]: Interpolant automaton has 3 states. [2018-06-22 02:09:26,908 INFO ]: Start isEmpty. Operand 10 states and 15 transitions. [2018-06-22 02:09:26,908 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 02:09:26,908 INFO ]: Found error trace [2018-06-22 02:09:26,908 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:09:26,908 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:09:26,908 INFO ]: Analyzing trace with hash -658899722, now seen corresponding path program 1 times [2018-06-22 02:09:26,909 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:09:26,909 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:09:26,910 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:09:26,910 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:09:26,910 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:09:26,923 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:09:26,968 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:09:26,968 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 02:09:26,968 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 02:09:26,969 INFO ]: Interpolant automaton has 3 states [2018-06-22 02:09:26,970 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 02:09:26,970 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 02:09:26,970 INFO ]: Start difference. First operand 10 states and 15 transitions. Second operand 3 states. [2018-06-22 02:09:27,014 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:09:27,014 INFO ]: Finished difference Result 12 states and 20 transitions. [2018-06-22 02:09:27,014 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 02:09:27,014 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 02:09:27,014 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:09:27,015 INFO ]: With dead ends: 12 [2018-06-22 02:09:27,015 INFO ]: Without dead ends: 12 [2018-06-22 02:09:27,015 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 [2018-06-22 02:09:27,016 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 02:09:27,018 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-06-22 02:09:27,018 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 02:09:27,018 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2018-06-22 02:09:27,018 INFO ]: Start accepts. Automaton has 10 states and 15 transitions. Word has length 7 [2018-06-22 02:09:27,018 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:09:27,018 INFO ]: Abstraction has 10 states and 15 transitions. [2018-06-22 02:09:27,018 INFO ]: Interpolant automaton has 3 states. [2018-06-22 02:09:27,018 INFO ]: Start isEmpty. Operand 10 states and 15 transitions. [2018-06-22 02:09:27,019 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 02:09:27,019 INFO ]: Found error trace [2018-06-22 02:09:27,019 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:09:27,019 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:09:27,019 INFO ]: Analyzing trace with hash -1157219455, now seen corresponding path program 1 times [2018-06-22 02:09:27,019 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:09:27,019 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:09:27,020 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:09:27,020 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:09:27,020 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:09:27,039 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:09:27,157 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:09:27,157 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 02:09:27,157 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) [2018-06-22 02:09:27,174 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 02:09:27,218 INFO ]: Conjunction of SSA is unsat [2018-06-22 02:09:27,229 INFO ]: Computing forward predicates... [2018-06-22 02:09:27,668 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 02:09:27,687 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 02:09:27,687 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-22 02:09:27,688 INFO ]: Interpolant automaton has 8 states [2018-06-22 02:09:27,688 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 02:09:27,688 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 02:09:27,688 INFO ]: Start difference. First operand 10 states and 15 transitions. Second operand 8 states. [2018-06-22 02:09:28,144 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 02:09:28,144 INFO ]: Finished difference Result 20 states and 37 transitions. [2018-06-22 02:09:28,144 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 02:09:28,144 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-22 02:09:28,144 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 02:09:28,144 INFO ]: With dead ends: 20 [2018-06-22 02:09:28,144 INFO ]: Without dead ends: 12 [2018-06-22 02:09:28,145 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-06-22 02:09:28,145 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 02:09:28,147 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-06-22 02:09:28,147 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 02:09:28,147 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-06-22 02:09:28,147 INFO ]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 9 [2018-06-22 02:09:28,147 INFO ]: Finished accepts. word is rejected. [2018-06-22 02:09:28,147 INFO ]: Abstraction has 10 states and 13 transitions. [2018-06-22 02:09:28,147 INFO ]: Interpolant automaton has 8 states. [2018-06-22 02:09:28,147 INFO ]: Start isEmpty. Operand 10 states and 13 transitions. [2018-06-22 02:09:28,147 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 02:09:28,147 INFO ]: Found error trace [2018-06-22 02:09:28,148 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 02:09:28,148 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 02:09:28,150 INFO ]: Analyzing trace with hash -1902172027, now seen corresponding path program 1 times [2018-06-22 02:09:28,150 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 02:09:28,150 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 02:09:28,151 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:09:28,151 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 02:09:28,151 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 02:09:28,170 INFO ]: Conjunction of SSA is sat [2018-06-22 02:09:28,176 INFO ]: Counterexample might be feasible [2018-06-22 02:09:28,191 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:09:28 BoogieIcfgContainer [2018-06-22 02:09:28,191 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 02:09:28,192 INFO ]: Toolchain (without parser) took 2190.19 ms. Allocated memory is still 309.3 MB. Free memory was 264.7 MB in the beginning and 193.2 MB in the end (delta: 71.5 MB). Peak memory consumption was 71.5 MB. Max. memory is 3.6 GB. [2018-06-22 02:09:28,193 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 02:09:28,194 INFO ]: ChcToBoogie took 67.60 ms. Allocated memory is still 309.3 MB. Free memory was 264.7 MB in the beginning and 262.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:09:28,194 INFO ]: Boogie Preprocessor took 41.53 ms. Allocated memory is still 309.3 MB. Free memory was 262.7 MB in the beginning and 261.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 02:09:28,195 INFO ]: RCFGBuilder took 297.10 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 251.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 02:09:28,196 INFO ]: TraceAbstraction took 1766.40 ms. Allocated memory is still 309.3 MB. Free memory was 251.7 MB in the beginning and 193.2 MB in the end (delta: 58.5 MB). Peak memory consumption was 58.5 MB. Max. memory is 3.6 GB. [2018-06-22 02:09:28,199 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 67.60 ms. Allocated memory is still 309.3 MB. Free memory was 264.7 MB in the beginning and 262.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 41.53 ms. Allocated memory is still 309.3 MB. Free memory was 262.7 MB in the beginning and 261.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 297.10 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 251.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1766.40 ms. Allocated memory is still 309.3 MB. Free memory was 251.7 MB in the beginning and 193.2 MB in the end (delta: 58.5 MB). Peak memory consumption was 58.5 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); [L0] gotoSwitch := gotoSwitch_in; [L0] assume (!(hbv_False_1_Int < hbv_False_2_Int) && !(hbv_False_5_Int < hbv_False_6_Int)) && !(hbv_False_3_Int == hbv_False_4_Int); [L0] hhv_INV_MAIN_42_0_Int, hhv_INV_MAIN_42_1_Int, hhv_INV_MAIN_42_2_Int, hhv_INV_MAIN_42_3_Int, hhv_INV_MAIN_42_4_Int, hhv_INV_MAIN_42_5_Int := hbv_False_3_Int, hbv_False_5_Int, hbv_False_6_Int, hbv_False_4_Int, hbv_False_1_Int, hbv_False_2_Int; [L0] havoc hbv_False_1_Int, hbv_False_2_Int, hbv_False_3_Int, hbv_False_5_Int, hbv_False_4_Int, hbv_False_6_Int; [L0] assume (hhv_INV_MAIN_42_0_Int == hbv_INV_MAIN_42_1_Int + 1 && !(hhv_INV_MAIN_42_2_Int < hhv_INV_MAIN_42_1_Int)) && !(hhv_INV_MAIN_42_5_Int < hhv_INV_MAIN_42_4_Int); [L0] hhv_INV_MAIN_23_0_Int, hhv_INV_MAIN_23_1_Int, hhv_INV_MAIN_23_2_Int, hhv_INV_MAIN_23_3_Int, hhv_INV_MAIN_23_4_Int, hhv_INV_MAIN_23_5_Int := hhv_INV_MAIN_42_1_Int, hbv_INV_MAIN_42_1_Int, hhv_INV_MAIN_42_2_Int, hhv_INV_MAIN_42_4_Int, hhv_INV_MAIN_42_3_Int, hhv_INV_MAIN_42_5_Int; [L0] havoc hbv_INV_MAIN_42_1_Int; [L0] assume ((((hbv_INV_MAIN_23_1_Int < hhv_INV_MAIN_23_2_Int && hhv_INV_MAIN_23_3_Int == hbv_INV_MAIN_23_2_Int + 1) && hhv_INV_MAIN_23_4_Int == hbv_INV_MAIN_23_3_Int - 2) && hhv_INV_MAIN_23_0_Int == hbv_INV_MAIN_23_1_Int + 1) && hhv_INV_MAIN_23_1_Int == hbv_INV_MAIN_23_4_Int - 2) && hbv_INV_MAIN_23_2_Int < hhv_INV_MAIN_23_5_Int; [L0] hhv_INV_MAIN_42_0_Int, hhv_INV_MAIN_42_1_Int, hhv_INV_MAIN_42_2_Int, hhv_INV_MAIN_42_3_Int, hhv_INV_MAIN_42_4_Int, hhv_INV_MAIN_42_5_Int := hbv_INV_MAIN_23_4_Int, hbv_INV_MAIN_23_1_Int, hhv_INV_MAIN_23_2_Int, hbv_INV_MAIN_23_3_Int, hbv_INV_MAIN_23_2_Int, hhv_INV_MAIN_23_5_Int; [L0] havoc hbv_INV_MAIN_23_4_Int, hbv_INV_MAIN_23_2_Int, hbv_INV_MAIN_23_1_Int, hbv_INV_MAIN_23_3_Int; [L0] assume ((hhv_INV_MAIN_42_4_Int == 0 && hhv_INV_MAIN_42_0_Int == hhv_INV_MAIN_42_3_Int) && hhv_INV_MAIN_42_2_Int == hhv_INV_MAIN_42_5_Int) && hhv_INV_MAIN_42_1_Int == 0; [L0] RET call gotoProc(0, 0, 0, 0, 0, 0, 0); [L0] assert false; - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 11 locations, 1 error locations. UNSAFE Result, 1.7s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 44 SDtfs, 15 SDslu, 53 SDs, 0 SdLazy, 80 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 650 SizeOfPredicates, 12 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 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/faulty__nested-while!.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_02-09-28-211.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/faulty__nested-while!.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_02-09-28-211.csv Received shutdown request...