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_No_Goto.epf -i /storage/chc-comp/hopv/lia/mochi/ack.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:25:44,953 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:25:44,955 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:25:44,969 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:25:44,969 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:25:44,970 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:25:44,971 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:25:44,974 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:25:44,975 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:25:44,976 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:25:44,977 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:25:44,977 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:25:44,978 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:25:44,979 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:25:44,980 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:25:44,981 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:25:44,982 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:25:44,990 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:25:44,992 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:25:44,997 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:25:44,998 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:25:45,000 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:25:45,000 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:25:45,001 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:25:45,001 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:25:45,002 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:25:45,003 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:25:45,004 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:25:45,005 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:25:45,005 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:25:45,005 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:25:45,006 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:25:45,006 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:25:45,007 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:25:45,008 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:25:45,008 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 11:25:45,028 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:25:45,029 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:25:45,030 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:25:45,030 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:25:45,031 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:25:45,032 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:25:45,032 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:25:45,032 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:25:45,032 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:25:45,032 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:25:45,033 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:25:45,033 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:25:45,033 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:25:45,033 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:25:45,033 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:25:45,033 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:25:45,034 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:25:45,034 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:25:45,035 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:25:45,036 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:25:45,036 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:25:45,096 INFO ]: Repository-Root is: /tmp [2018-06-22 11:25:45,114 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:25:45,118 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:25:45,119 INFO ]: Initializing SmtParser... [2018-06-22 11:25:45,119 INFO ]: SmtParser initialized [2018-06-22 11:25:45,120 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/mochi/ack.smt2 [2018-06-22 11:25:45,122 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 11:25:45,215 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/mochi/ack.smt2 unknown [2018-06-22 11:25:45,385 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/mochi/ack.smt2 [2018-06-22 11:25:45,393 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:25:45,399 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:25:45,399 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:25:45,399 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:25:45,399 INFO ]: ChcToBoogie initialized [2018-06-22 11:25:45,404 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:25:45" (1/1) ... [2018-06-22 11:25:45,451 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:25:45 Unit [2018-06-22 11:25:45,451 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:25:45,452 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:25:45,452 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:25:45,452 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:25:45,474 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:25:45" (1/1) ... [2018-06-22 11:25:45,474 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:25:45" (1/1) ... [2018-06-22 11:25:45,483 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:25:45" (1/1) ... [2018-06-22 11:25:45,484 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:25:45" (1/1) ... [2018-06-22 11:25:45,486 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:25:45" (1/1) ... [2018-06-22 11:25:45,488 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:25:45" (1/1) ... [2018-06-22 11:25:45,488 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:25:45" (1/1) ... [2018-06-22 11:25:45,490 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:25:45,490 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:25:45,490 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:25:45,491 INFO ]: RCFGBuilder initialized [2018-06-22 11:25:45,491 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:25:45" (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 11:25:45,505 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:25:45,505 INFO ]: Found specification of procedure False [2018-06-22 11:25:45,505 INFO ]: Found implementation of procedure False [2018-06-22 11:25:45,505 INFO ]: Specification and implementation of procedure ackDLRunknownCLN3 given in one single declaration [2018-06-22 11:25:45,505 INFO ]: Found specification of procedure ackDLRunknownCLN3 [2018-06-22 11:25:45,505 INFO ]: Found implementation of procedure ackDLRunknownCLN3 [2018-06-22 11:25:45,505 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:25:45,505 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:25:45,505 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 11:25:45,773 INFO ]: Using library mode [2018-06-22 11:25:45,774 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:25:45 BoogieIcfgContainer [2018-06-22 11:25:45,774 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:25:45,775 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:25:45,776 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:25:45,778 INFO ]: TraceAbstraction initialized [2018-06-22 11:25:45,779 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:25:45" (1/3) ... [2018-06-22 11:25:45,779 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35db82c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:25:45, skipping insertion in model container [2018-06-22 11:25:45,780 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:25:45" (2/3) ... [2018-06-22 11:25:45,780 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35db82c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:25:45, skipping insertion in model container [2018-06-22 11:25:45,780 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:25:45" (3/3) ... [2018-06-22 11:25:45,782 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:25:45,791 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:25:45,802 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:25:45,839 INFO ]: Using default assertion order modulation [2018-06-22 11:25:45,839 INFO ]: Interprodecural is true [2018-06-22 11:25:45,839 INFO ]: Hoare is false [2018-06-22 11:25:45,839 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:25:45,839 INFO ]: Backedges is TWOTRACK [2018-06-22 11:25:45,839 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:25:45,839 INFO ]: Difference is false [2018-06-22 11:25:45,839 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:25:45,839 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:25:45,853 INFO ]: Start isEmpty. Operand 15 states. [2018-06-22 11:25:45,868 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-22 11:25:45,868 INFO ]: Found error trace [2018-06-22 11:25:45,868 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-22 11:25:45,869 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:25:45,875 INFO ]: Analyzing trace with hash 85076353, now seen corresponding path program 1 times [2018-06-22 11:25:45,877 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:25:45,877 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:25:45,913 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:25:45,913 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:25:45,913 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:25:45,930 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:25:45,952 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:25:45,954 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:25:45,954 INFO ]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-06-22 11:25:45,956 INFO ]: Interpolant automaton has 2 states [2018-06-22 11:25:45,971 INFO ]: Constructing interpolant automaton starting with 2 interpolants. [2018-06-22 11:25:45,972 INFO ]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 11:25:45,974 INFO ]: Start difference. First operand 15 states. Second operand 2 states. [2018-06-22 11:25:45,994 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:25:45,995 INFO ]: Finished difference Result 13 states and 17 transitions. [2018-06-22 11:25:45,995 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-06-22 11:25:45,996 INFO ]: Start accepts. Automaton has 2 states. Word has length 5 [2018-06-22 11:25:45,996 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:25:46,009 INFO ]: With dead ends: 13 [2018-06-22 11:25:46,010 INFO ]: Without dead ends: 13 [2018-06-22 11:25:46,013 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 [2018-06-22 11:25:46,027 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 11:25:46,050 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 11:25:46,050 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 11:25:46,051 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2018-06-22 11:25:46,052 INFO ]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 5 [2018-06-22 11:25:46,052 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:25:46,052 INFO ]: Abstraction has 13 states and 17 transitions. [2018-06-22 11:25:46,053 INFO ]: Interpolant automaton has 2 states. [2018-06-22 11:25:46,053 INFO ]: Start isEmpty. Operand 13 states and 17 transitions. [2018-06-22 11:25:46,054 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 11:25:46,054 INFO ]: Found error trace [2018-06-22 11:25:46,054 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:25:46,054 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:25:46,054 INFO ]: Analyzing trace with hash 1336765518, now seen corresponding path program 1 times [2018-06-22 11:25:46,054 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:25:46,054 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:25:46,055 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:25:46,055 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:25:46,055 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:25:46,078 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:25:46,176 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:25:46,176 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:25:46,176 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:25:46,177 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:25:46,178 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:25:46,178 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:25:46,178 INFO ]: Start difference. First operand 13 states and 17 transitions. Second operand 4 states. [2018-06-22 11:25:46,261 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:25:46,261 INFO ]: Finished difference Result 15 states and 21 transitions. [2018-06-22 11:25:46,261 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:25:46,261 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 11:25:46,261 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:25:46,262 INFO ]: With dead ends: 15 [2018-06-22 11:25:46,262 INFO ]: Without dead ends: 15 [2018-06-22 11:25:46,263 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:25:46,263 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 11:25:46,269 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 11:25:46,269 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 11:25:46,270 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2018-06-22 11:25:46,270 INFO ]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 9 [2018-06-22 11:25:46,270 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:25:46,270 INFO ]: Abstraction has 15 states and 21 transitions. [2018-06-22 11:25:46,270 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:25:46,270 INFO ]: Start isEmpty. Operand 15 states and 21 transitions. [2018-06-22 11:25:46,271 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:25:46,271 INFO ]: Found error trace [2018-06-22 11:25:46,271 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:25:46,271 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:25:46,272 INFO ]: Analyzing trace with hash 121284144, now seen corresponding path program 1 times [2018-06-22 11:25:46,272 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:25:46,272 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:25:46,272 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:25:46,272 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:25:46,272 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:25:46,288 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:25:46,435 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:25:46,435 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:25:46,435 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-06-22 11:25:46,435 INFO ]: Interpolant automaton has 6 states [2018-06-22 11:25:46,435 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 11:25:46,436 INFO ]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-22 11:25:46,436 INFO ]: Start difference. First operand 15 states and 21 transitions. Second operand 6 states. [2018-06-22 11:25:46,699 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:25:46,699 INFO ]: Finished difference Result 19 states and 30 transitions. [2018-06-22 11:25:46,700 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 11:25:46,700 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 11:25:46,700 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:25:46,701 INFO ]: With dead ends: 19 [2018-06-22 11:25:46,701 INFO ]: Without dead ends: 19 [2018-06-22 11:25:46,701 INFO ]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:25:46,701 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 11:25:46,707 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-06-22 11:25:46,707 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 11:25:46,707 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2018-06-22 11:25:46,707 INFO ]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 13 [2018-06-22 11:25:46,708 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:25:46,708 INFO ]: Abstraction has 15 states and 21 transitions. [2018-06-22 11:25:46,708 INFO ]: Interpolant automaton has 6 states. [2018-06-22 11:25:46,708 INFO ]: Start isEmpty. Operand 15 states and 21 transitions. [2018-06-22 11:25:46,709 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:25:46,709 INFO ]: Found error trace [2018-06-22 11:25:46,709 INFO ]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:25:46,709 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:25:46,709 INFO ]: Analyzing trace with hash -1320254948, now seen corresponding path program 1 times [2018-06-22 11:25:46,709 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:25:46,709 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:25:46,711 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:25:46,711 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:25:46,711 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:25:46,744 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:25:46,964 INFO ]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:25:46,964 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:25:46,965 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 [2018-06-22 11:25:46,976 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:25:47,005 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:25:47,012 INFO ]: Computing forward predicates... [2018-06-22 11:25:47,440 INFO ]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 11:25:47,473 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 11:25:47,473 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2018-06-22 11:25:47,473 INFO ]: Interpolant automaton has 9 states [2018-06-22 11:25:47,473 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 11:25:47,473 INFO ]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:25:47,474 INFO ]: Start difference. First operand 15 states and 21 transitions. Second operand 9 states. [2018-06-22 11:25:47,871 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:25:47,871 INFO ]: Finished difference Result 20 states and 31 transitions. [2018-06-22 11:25:47,872 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 11:25:47,872 INFO ]: Start accepts. Automaton has 9 states. Word has length 17 [2018-06-22 11:25:47,872 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:25:47,873 INFO ]: With dead ends: 20 [2018-06-22 11:25:47,873 INFO ]: Without dead ends: 20 [2018-06-22 11:25:47,873 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:25:47,873 INFO ]: Start minimizeSevpa. Operand 20 states. [2018-06-22 11:25:47,879 INFO ]: Finished minimizeSevpa. Reduced states from 20 to 18. [2018-06-22 11:25:47,879 INFO ]: Start removeUnreachable. Operand 18 states. [2018-06-22 11:25:47,880 INFO ]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2018-06-22 11:25:47,880 INFO ]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 17 [2018-06-22 11:25:47,880 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:25:47,880 INFO ]: Abstraction has 18 states and 26 transitions. [2018-06-22 11:25:47,880 INFO ]: Interpolant automaton has 9 states. [2018-06-22 11:25:47,880 INFO ]: Start isEmpty. Operand 18 states and 26 transitions. [2018-06-22 11:25:47,881 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:25:47,881 INFO ]: Found error trace [2018-06-22 11:25:47,881 INFO ]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:25:47,881 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:25:47,881 INFO ]: Analyzing trace with hash 1978077310, now seen corresponding path program 1 times [2018-06-22 11:25:47,881 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:25:47,881 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:25:47,882 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:25:47,882 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:25:47,882 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:25:47,899 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:25:48,195 INFO ]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:25:48,195 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:25:48,195 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 11:25:48,208 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:25:48,238 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:25:48,241 INFO ]: Computing forward predicates... [2018-06-22 11:25:48,620 INFO ]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:25:48,647 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:25:48,647 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-06-22 11:25:48,647 INFO ]: Interpolant automaton has 14 states [2018-06-22 11:25:48,647 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 11:25:48,647 INFO ]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-06-22 11:25:48,648 INFO ]: Start difference. First operand 18 states and 26 transitions. Second operand 14 states. [2018-06-22 11:25:49,139 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:25:49,139 INFO ]: Finished difference Result 19 states and 31 transitions. [2018-06-22 11:25:49,139 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 11:25:49,139 INFO ]: Start accepts. Automaton has 14 states. Word has length 21 [2018-06-22 11:25:49,140 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:25:49,140 INFO ]: With dead ends: 19 [2018-06-22 11:25:49,140 INFO ]: Without dead ends: 0 [2018-06-22 11:25:49,140 INFO ]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2018-06-22 11:25:49,140 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 11:25:49,140 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 11:25:49,140 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 11:25:49,140 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 11:25:49,140 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 11:25:49,140 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:25:49,140 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 11:25:49,140 INFO ]: Interpolant automaton has 14 states. [2018-06-22 11:25:49,140 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 11:25:49,140 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 11:25:49,145 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:25:49 BoogieIcfgContainer [2018-06-22 11:25:49,145 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:25:49,146 INFO ]: Toolchain (without parser) took 3753.16 ms. Allocated memory was 309.3 MB in the beginning and 325.6 MB in the end (delta: 16.3 MB). Free memory was 265.9 MB in the beginning and 220.4 MB in the end (delta: 45.5 MB). Peak memory consumption was 61.7 MB. Max. memory is 3.6 GB. [2018-06-22 11:25:49,148 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 275.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:25:49,148 INFO ]: ChcToBoogie took 52.37 ms. Allocated memory is still 309.3 MB. Free memory was 264.9 MB in the beginning and 263.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 11:25:49,149 INFO ]: Boogie Preprocessor took 37.93 ms. Allocated memory is still 309.3 MB. Free memory was 263.9 MB in the beginning and 261.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:25:49,150 INFO ]: RCFGBuilder took 283.61 ms. Allocated memory is still 309.3 MB. Free memory was 261.9 MB in the beginning and 253.9 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:25:49,150 INFO ]: TraceAbstraction took 3369.99 ms. Allocated memory was 309.3 MB in the beginning and 325.6 MB in the end (delta: 16.3 MB). Free memory was 253.9 MB in the beginning and 220.4 MB in the end (delta: 33.5 MB). Peak memory consumption was 49.8 MB. Max. memory is 3.6 GB. [2018-06-22 11:25:49,154 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 309.3 MB. Free memory is still 275.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 52.37 ms. Allocated memory is still 309.3 MB. Free memory was 264.9 MB in the beginning and 263.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * Boogie Preprocessor took 37.93 ms. Allocated memory is still 309.3 MB. Free memory was 263.9 MB in the beginning and 261.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 283.61 ms. Allocated memory is still 309.3 MB. Free memory was 261.9 MB in the beginning and 253.9 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3369.99 ms. Allocated memory was 309.3 MB in the beginning and 325.6 MB in the end (delta: 16.3 MB). Free memory was 253.9 MB in the beginning and 220.4 MB in the end (delta: 33.5 MB). Peak memory consumption was 49.8 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 3 procedures, 15 locations, 1 error locations. SAFE Result, 3.3s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 74 SDtfs, 14 SDslu, 138 SDs, 0 SdLazy, 283 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=4, 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, 5 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 103 NumberOfCodeBlocks, 103 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 5108 SizeOfPredicates, 13 NumberOfNonLiveVariables, 151 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 43/57 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/ack.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-25-49-165.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ack.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-25-49-165.csv Received shutdown request...