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/faulty__nested-while!.smt2' -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 09:50:28,533 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 09:50:28,535 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 09:50:28,547 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 09:50:28,547 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 09:50:28,549 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 09:50:28,550 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 09:50:28,554 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 09:50:28,555 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 09:50:28,557 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 09:50:28,558 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 09:50:28,558 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 09:50:28,559 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 09:50:28,560 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 09:50:28,564 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 09:50:28,565 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 09:50:28,567 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 09:50:28,579 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 09:50:28,580 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 09:50:28,581 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 09:50:28,582 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 09:50:28,584 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 09:50:28,584 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 09:50:28,585 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 09:50:28,585 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 09:50:28,586 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 09:50:28,587 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 09:50:28,587 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 09:50:28,588 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 09:50:28,589 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 09:50:28,589 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 09:50:28,590 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 09:50:28,590 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 09:50:28,591 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 09:50:28,591 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 09:50:28,591 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 09:50:28,604 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 09:50:28,604 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 09:50:28,605 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 09:50:28,605 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 09:50:28,606 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 09:50:28,606 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 09:50:28,606 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 09:50:28,606 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 09:50:28,607 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 09:50:28,607 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 09:50:28,607 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 09:50:28,607 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 09:50:28,607 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 09:50:28,607 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 09:50:28,608 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 09:50:28,608 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 09:50:28,608 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 09:50:28,608 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 09:50:28,608 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 09:50:28,609 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 09:50:28,609 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 09:50:28,610 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 09:50:28,610 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 09:50:28,643 INFO ]: Repository-Root is: /tmp [2018-06-25 09:50:28,659 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 09:50:28,664 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 09:50:28,666 INFO ]: Initializing SmtParser... [2018-06-25 09:50:28,666 INFO ]: SmtParser initialized [2018-06-25 09:50:28,667 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/faulty__nested-while!.smt2 [2018-06-25 09:50:28,668 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 09:50:28,757 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@3ec66a8c [2018-06-25 09:50:28,921 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/faulty__nested-while!.smt2 [2018-06-25 09:50:28,925 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 09:50:28,931 INFO ]: Walking toolchain with 4 elements. [2018-06-25 09:50:28,931 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 09:50:28,931 INFO ]: Initializing ChcToBoogie... [2018-06-25 09:50:28,932 INFO ]: ChcToBoogie initialized [2018-06-25 09:50:28,938 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 09:50:28" (1/1) ... [2018-06-25 09:50:28,993 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:50:28 Unit [2018-06-25 09:50:28,993 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 09:50:28,993 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 09:50:28,994 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 09:50:28,994 INFO ]: Boogie Preprocessor initialized [2018-06-25 09:50:29,014 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:50:28" (1/1) ... [2018-06-25 09:50:29,014 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:50:28" (1/1) ... [2018-06-25 09:50:29,020 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:50:28" (1/1) ... [2018-06-25 09:50:29,020 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:50:28" (1/1) ... [2018-06-25 09:50:29,022 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:50:28" (1/1) ... [2018-06-25 09:50:29,025 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:50:28" (1/1) ... [2018-06-25 09:50:29,026 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:50:28" (1/1) ... [2018-06-25 09:50:29,027 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 09:50:29,030 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 09:50:29,030 INFO ]: Initializing RCFGBuilder... [2018-06-25 09:50:29,030 INFO ]: RCFGBuilder initialized [2018-06-25 09:50:29,031 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:50:28" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-25 09:50:29,046 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 09:50:29,046 INFO ]: Found specification of procedure gotoProc [2018-06-25 09:50:29,046 INFO ]: Found implementation of procedure gotoProc [2018-06-25 09:50:29,046 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 09:50:29,046 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 09:50:29,046 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 09:50:29,338 INFO ]: Using library mode [2018-06-25 09:50:29,338 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 09:50:29 BoogieIcfgContainer [2018-06-25 09:50:29,338 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 09:50:29,339 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 09:50:29,340 INFO ]: Initializing TraceAbstraction... [2018-06-25 09:50:29,343 INFO ]: TraceAbstraction initialized [2018-06-25 09:50:29,344 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 09:50:28" (1/3) ... [2018-06-25 09:50:29,344 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5b94d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 09:50:29, skipping insertion in model container [2018-06-25 09:50:29,344 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:50:28" (2/3) ... [2018-06-25 09:50:29,345 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f5b94d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 09:50:29, skipping insertion in model container [2018-06-25 09:50:29,345 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 09:50:29" (3/3) ... [2018-06-25 09:50:29,346 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 09:50:29,355 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 09:50:29,364 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 09:50:29,420 INFO ]: Using default assertion order modulation [2018-06-25 09:50:29,421 INFO ]: Interprodecural is true [2018-06-25 09:50:29,421 INFO ]: Hoare is false [2018-06-25 09:50:29,421 INFO ]: Compute interpolants for FPandBP [2018-06-25 09:50:29,421 INFO ]: Backedges is TWOTRACK [2018-06-25 09:50:29,421 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 09:50:29,421 INFO ]: Difference is false [2018-06-25 09:50:29,421 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 09:50:29,421 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 09:50:29,440 INFO ]: Start isEmpty. Operand 11 states. [2018-06-25 09:50:29,455 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 09:50:29,455 INFO ]: Found error trace [2018-06-25 09:50:29,459 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:50:29,459 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:50:29,463 INFO ]: Analyzing trace with hash -662593806, now seen corresponding path program 1 times [2018-06-25 09:50:29,465 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:50:29,465 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:50:29,496 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:50:29,496 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:50:29,496 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:50:29,535 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:50:29,607 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:50:29,609 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 09:50:29,609 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 09:50:29,611 INFO ]: Interpolant automaton has 3 states [2018-06-25 09:50:29,621 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 09:50:29,621 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 09:50:29,623 INFO ]: Start difference. First operand 11 states. Second operand 3 states. [2018-06-25 09:50:29,716 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:50:29,717 INFO ]: Finished difference Result 11 states and 19 transitions. [2018-06-25 09:50:29,717 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 09:50:29,718 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 09:50:29,718 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:50:29,725 INFO ]: With dead ends: 11 [2018-06-25 09:50:29,725 INFO ]: Without dead ends: 11 [2018-06-25 09:50:29,727 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 09:50:29,741 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 09:50:29,759 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-06-25 09:50:29,761 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 09:50:29,761 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2018-06-25 09:50:29,762 INFO ]: Start accepts. Automaton has 10 states and 15 transitions. Word has length 7 [2018-06-25 09:50:29,763 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:50:29,763 INFO ]: Abstraction has 10 states and 15 transitions. [2018-06-25 09:50:29,763 INFO ]: Interpolant automaton has 3 states. [2018-06-25 09:50:29,763 INFO ]: Start isEmpty. Operand 10 states and 15 transitions. [2018-06-25 09:50:29,763 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 09:50:29,763 INFO ]: Found error trace [2018-06-25 09:50:29,763 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:50:29,763 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:50:29,763 INFO ]: Analyzing trace with hash -658899722, now seen corresponding path program 1 times [2018-06-25 09:50:29,763 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:50:29,763 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:50:29,764 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:50:29,764 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:50:29,764 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:50:29,771 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:50:29,800 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:50:29,800 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 09:50:29,800 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 09:50:29,802 INFO ]: Interpolant automaton has 3 states [2018-06-25 09:50:29,802 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 09:50:29,802 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 09:50:29,802 INFO ]: Start difference. First operand 10 states and 15 transitions. Second operand 3 states. [2018-06-25 09:50:29,834 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:50:29,834 INFO ]: Finished difference Result 12 states and 20 transitions. [2018-06-25 09:50:29,835 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 09:50:29,835 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 09:50:29,835 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:50:29,835 INFO ]: With dead ends: 12 [2018-06-25 09:50:29,835 INFO ]: Without dead ends: 12 [2018-06-25 09:50:29,836 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 09:50:29,836 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 09:50:29,837 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-06-25 09:50:29,837 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 09:50:29,838 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2018-06-25 09:50:29,838 INFO ]: Start accepts. Automaton has 10 states and 15 transitions. Word has length 7 [2018-06-25 09:50:29,838 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:50:29,838 INFO ]: Abstraction has 10 states and 15 transitions. [2018-06-25 09:50:29,838 INFO ]: Interpolant automaton has 3 states. [2018-06-25 09:50:29,838 INFO ]: Start isEmpty. Operand 10 states and 15 transitions. [2018-06-25 09:50:29,838 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 09:50:29,838 INFO ]: Found error trace [2018-06-25 09:50:29,838 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:50:29,839 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:50:29,839 INFO ]: Analyzing trace with hash -1157219455, now seen corresponding path program 1 times [2018-06-25 09:50:29,839 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:50:29,839 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:50:29,839 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:50:29,839 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:50:29,839 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:50:29,857 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:50:30,001 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:50:30,001 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:50:30,001 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 09:50:30,008 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:50:30,052 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:50:30,063 INFO ]: Computing forward predicates... [2018-06-25 09:50:30,298 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:50:30,329 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:50:30,329 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-25 09:50:30,330 INFO ]: Interpolant automaton has 8 states [2018-06-25 09:50:30,330 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 09:50:30,330 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-25 09:50:30,330 INFO ]: Start difference. First operand 10 states and 15 transitions. Second operand 8 states. [2018-06-25 09:50:30,535 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-25 09:50:30,832 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:50:30,832 INFO ]: Finished difference Result 20 states and 37 transitions. [2018-06-25 09:50:30,832 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-25 09:50:30,832 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-25 09:50:30,832 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:50:30,833 INFO ]: With dead ends: 20 [2018-06-25 09:50:30,833 INFO ]: Without dead ends: 12 [2018-06-25 09:50:30,833 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-06-25 09:50:30,833 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 09:50:30,835 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-06-25 09:50:30,835 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 09:50:30,835 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-06-25 09:50:30,835 INFO ]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 9 [2018-06-25 09:50:30,835 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:50:30,835 INFO ]: Abstraction has 10 states and 13 transitions. [2018-06-25 09:50:30,835 INFO ]: Interpolant automaton has 8 states. [2018-06-25 09:50:30,835 INFO ]: Start isEmpty. Operand 10 states and 13 transitions. [2018-06-25 09:50:30,836 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 09:50:30,836 INFO ]: Found error trace [2018-06-25 09:50:30,836 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:50:30,836 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:50:30,836 INFO ]: Analyzing trace with hash -1902172027, now seen corresponding path program 1 times [2018-06-25 09:50:30,836 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:50:30,836 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:50:30,837 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:50:30,837 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:50:30,837 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:50:30,855 INFO ]: Conjunction of SSA is sat [2018-06-25 09:50:30,858 INFO ]: Counterexample might be feasible [2018-06-25 09:50:30,870 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 09:50:30 BoogieIcfgContainer [2018-06-25 09:50:30,870 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 09:50:30,871 INFO ]: Toolchain (without parser) took 1945.51 ms. Allocated memory is still 303.6 MB. Free memory was 256.9 MB in the beginning and 185.9 MB in the end (delta: 71.0 MB). Peak memory consumption was 71.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:50:30,872 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 303.6 MB. Free memory is still 267.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 09:50:30,873 INFO ]: ChcToBoogie took 61.85 ms. Allocated memory is still 303.6 MB. Free memory was 256.9 MB in the beginning and 254.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:50:30,873 INFO ]: Boogie Preprocessor took 33.88 ms. Allocated memory is still 303.6 MB. Free memory was 254.9 MB in the beginning and 253.9 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. [2018-06-25 09:50:30,874 INFO ]: RCFGBuilder took 308.69 ms. Allocated memory is still 303.6 MB. Free memory was 253.9 MB in the beginning and 243.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:50:30,874 INFO ]: TraceAbstraction took 1531.05 ms. Allocated memory is still 303.6 MB. Free memory was 243.9 MB in the beginning and 185.9 MB in the end (delta: 58.0 MB). Peak memory consumption was 58.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:50:30,878 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 303.6 MB. Free memory is still 267.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.85 ms. Allocated memory is still 303.6 MB. Free memory was 256.9 MB in the beginning and 254.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 33.88 ms. Allocated memory is still 303.6 MB. Free memory was 254.9 MB in the beginning and 253.9 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. * RCFGBuilder took 308.69 ms. Allocated memory is still 303.6 MB. Free memory was 253.9 MB in the beginning and 243.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1531.05 ms. Allocated memory is still 303.6 MB. Free memory was 243.9 MB in the beginning and 185.9 MB in the end (delta: 58.0 MB). Peak memory consumption was 58.0 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [UNKNOWN] : assertion can be violated assertion can be violated We found a FailurePath: [L0] CALL call gotoProc(0, 0, 0, 0, 0, 0, 0); [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_6_Int, hbv_False_1_Int, hbv_False_2_Int, hbv_False_4_Int, hbv_False_3_Int, hbv_False_5_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_2_Int, hbv_INV_MAIN_23_4_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, 1.4s 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, 0.5s 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, 0.4s 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-0-2018-06-25_09-50-30-904.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-0-2018-06-25_09-50-30-904.csv Received shutdown request...