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/llreve-bench/smt2/loop__fib.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:59:15,908 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:59:15,910 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:59:15,924 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:59:15,924 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:59:15,925 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:59:15,926 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:59:15,929 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:59:15,930 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:59:15,931 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:59:15,932 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:59:15,932 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:59:15,933 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:59:15,936 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:59:15,937 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:59:15,938 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:59:15,939 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:59:15,949 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:59:15,951 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:59:15,954 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:59:15,955 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:59:15,957 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:59:15,957 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:59:15,957 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:59:15,960 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:59:15,960 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:59:15,961 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:59:15,962 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:59:15,966 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:59:15,966 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:59:15,967 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:59:15,967 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:59:15,967 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:59:15,968 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:59:15,969 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:59:15,970 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 11:59:15,992 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:59:15,994 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:59:15,994 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:59:15,995 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:59:15,995 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:59:15,995 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:59:15,996 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:59:15,996 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:59:15,996 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:59:15,996 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:59:15,996 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:59:15,996 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:59:15,997 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:59:15,997 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:59:15,997 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:59:15,997 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:59:15,997 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:59:15,997 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:59:15,998 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:59:15,999 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:59:15,999 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:59:16,054 INFO ]: Repository-Root is: /tmp [2018-06-22 11:59:16,071 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:59:16,075 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:59:16,076 INFO ]: Initializing SmtParser... [2018-06-22 11:59:16,076 INFO ]: SmtParser initialized [2018-06-22 11:59:16,077 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/loop__fib.smt2 [2018-06-22 11:59:16,078 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 11:59:16,170 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/loop__fib.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@102b3ddb [2018-06-22 11:59:16,359 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/loop__fib.smt2 [2018-06-22 11:59:16,363 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:59:16,368 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:59:16,369 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:59:16,369 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:59:16,369 INFO ]: ChcToBoogie initialized [2018-06-22 11:59:16,373 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:59:16" (1/1) ... [2018-06-22 11:59:16,418 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:16 Unit [2018-06-22 11:59:16,418 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:59:16,419 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:59:16,419 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:59:16,419 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:59:16,444 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:16" (1/1) ... [2018-06-22 11:59:16,444 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:16" (1/1) ... [2018-06-22 11:59:16,452 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:16" (1/1) ... [2018-06-22 11:59:16,452 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:16" (1/1) ... [2018-06-22 11:59:16,454 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:16" (1/1) ... [2018-06-22 11:59:16,455 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:16" (1/1) ... [2018-06-22 11:59:16,457 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:16" (1/1) ... [2018-06-22 11:59:16,458 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:59:16,459 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:59:16,459 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:59:16,459 INFO ]: RCFGBuilder initialized [2018-06-22 11:59:16,459 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:16" (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) [2018-06-22 11:59:16,476 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:59:16,476 INFO ]: Found specification of procedure False [2018-06-22 11:59:16,476 INFO ]: Found implementation of procedure False [2018-06-22 11:59:16,476 INFO ]: Specification and implementation of procedure INV_MAIN_42 given in one single declaration [2018-06-22 11:59:16,476 INFO ]: Found specification of procedure INV_MAIN_42 [2018-06-22 11:59:16,476 INFO ]: Found implementation of procedure INV_MAIN_42 [2018-06-22 11:59:16,476 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:59:16,476 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:59:16,476 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 [2018-06-22 11:59:16,657 INFO ]: Using library mode [2018-06-22 11:59:16,658 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:59:16 BoogieIcfgContainer [2018-06-22 11:59:16,658 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:59:16,659 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:59:16,659 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:59:16,664 INFO ]: TraceAbstraction initialized [2018-06-22 11:59:16,664 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:59:16" (1/3) ... [2018-06-22 11:59:16,665 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f19ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:59:16, skipping insertion in model container [2018-06-22 11:59:16,665 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:16" (2/3) ... [2018-06-22 11:59:16,665 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f19ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:59:16, skipping insertion in model container [2018-06-22 11:59:16,665 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:59:16" (3/3) ... [2018-06-22 11:59:16,667 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:59:16,676 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:59:16,683 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:59:16,719 INFO ]: Using default assertion order modulation [2018-06-22 11:59:16,720 INFO ]: Interprodecural is true [2018-06-22 11:59:16,720 INFO ]: Hoare is false [2018-06-22 11:59:16,720 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:59:16,720 INFO ]: Backedges is TWOTRACK [2018-06-22 11:59:16,720 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:59:16,720 INFO ]: Difference is false [2018-06-22 11:59:16,720 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:59:16,720 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:59:16,732 INFO ]: Start isEmpty. Operand 15 states. [2018-06-22 11:59:16,744 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 11:59:16,744 INFO ]: Found error trace [2018-06-22 11:59:16,745 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:16,745 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:16,748 INFO ]: Analyzing trace with hash -1283464881, now seen corresponding path program 1 times [2018-06-22 11:59:16,750 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:16,750 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:16,781 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:16,781 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:16,781 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:16,811 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:16,973 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:59:16,975 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:59:16,975 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:59:16,976 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:59:16,986 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:59:16,986 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:59:16,988 INFO ]: Start difference. First operand 15 states. Second operand 4 states. [2018-06-22 11:59:17,115 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:17,115 INFO ]: Finished difference Result 15 states and 22 transitions. [2018-06-22 11:59:17,116 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:59:17,117 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 11:59:17,117 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:17,125 INFO ]: With dead ends: 15 [2018-06-22 11:59:17,125 INFO ]: Without dead ends: 15 [2018-06-22 11:59:17,126 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:59:17,138 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 11:59:17,157 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 11:59:17,159 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 11:59:17,159 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2018-06-22 11:59:17,161 INFO ]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 9 [2018-06-22 11:59:17,161 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:17,161 INFO ]: Abstraction has 15 states and 22 transitions. [2018-06-22 11:59:17,161 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:59:17,161 INFO ]: Start isEmpty. Operand 15 states and 22 transitions. [2018-06-22 11:59:17,163 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:59:17,164 INFO ]: Found error trace [2018-06-22 11:59:17,164 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:17,164 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:17,164 INFO ]: Analyzing trace with hash -176390316, now seen corresponding path program 1 times [2018-06-22 11:59:17,164 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:17,164 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:17,165 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:17,165 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:17,165 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:17,185 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:17,242 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:59:17,242 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:59:17,242 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:59:17,243 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:59:17,243 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:59:17,243 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:59:17,243 INFO ]: Start difference. First operand 15 states and 22 transitions. Second operand 4 states. [2018-06-22 11:59:17,441 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:17,441 INFO ]: Finished difference Result 17 states and 26 transitions. [2018-06-22 11:59:17,442 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:59:17,442 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 11:59:17,442 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:17,443 INFO ]: With dead ends: 17 [2018-06-22 11:59:17,443 INFO ]: Without dead ends: 17 [2018-06-22 11:59:17,444 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 11:59:17,444 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 11:59:17,450 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 15. [2018-06-22 11:59:17,450 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 11:59:17,451 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2018-06-22 11:59:17,453 INFO ]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 13 [2018-06-22 11:59:17,454 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:17,454 INFO ]: Abstraction has 15 states and 21 transitions. [2018-06-22 11:59:17,454 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:59:17,454 INFO ]: Start isEmpty. Operand 15 states and 21 transitions. [2018-06-22 11:59:17,454 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:59:17,454 INFO ]: Found error trace [2018-06-22 11:59:17,455 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:17,455 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:17,455 INFO ]: Analyzing trace with hash -28614159, now seen corresponding path program 1 times [2018-06-22 11:59:17,455 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:17,455 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:17,456 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:17,456 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:17,456 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:17,472 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:17,703 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:59:17,703 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:17,703 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 11:59:17,712 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:17,738 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:17,744 INFO ]: Computing forward predicates... [2018-06-22 11:59:17,810 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:59:17,849 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:17,849 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 11:59:17,849 INFO ]: Interpolant automaton has 7 states [2018-06-22 11:59:17,849 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 11:59:17,850 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:59:17,850 INFO ]: Start difference. First operand 15 states and 21 transitions. Second operand 7 states. [2018-06-22 11:59:18,300 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:18,300 INFO ]: Finished difference Result 21 states and 34 transitions. [2018-06-22 11:59:18,300 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:59:18,300 INFO ]: Start accepts. Automaton has 7 states. Word has length 13 [2018-06-22 11:59:18,300 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:18,301 INFO ]: With dead ends: 21 [2018-06-22 11:59:18,301 INFO ]: Without dead ends: 21 [2018-06-22 11:59:18,302 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:59:18,302 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 11:59:18,308 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 17. [2018-06-22 11:59:18,308 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 11:59:18,308 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2018-06-22 11:59:18,308 INFO ]: Start accepts. Automaton has 17 states and 25 transitions. Word has length 13 [2018-06-22 11:59:18,309 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:18,309 INFO ]: Abstraction has 17 states and 25 transitions. [2018-06-22 11:59:18,309 INFO ]: Interpolant automaton has 7 states. [2018-06-22 11:59:18,309 INFO ]: Start isEmpty. Operand 17 states and 25 transitions. [2018-06-22 11:59:18,310 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:59:18,310 INFO ]: Found error trace [2018-06-22 11:59:18,310 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:18,310 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:18,310 INFO ]: Analyzing trace with hash 68860537, now seen corresponding path program 1 times [2018-06-22 11:59:18,310 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:18,310 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:18,311 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:18,311 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:18,311 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:18,329 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:18,500 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:59:18,500 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:18,500 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 11:59:18,516 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 11:59:18,544 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:18,546 INFO ]: Computing forward predicates... [2018-06-22 11:59:18,773 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:59:18,792 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:18,792 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 11:59:18,792 INFO ]: Interpolant automaton has 9 states [2018-06-22 11:59:18,792 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 11:59:18,792 INFO ]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:59:18,793 INFO ]: Start difference. First operand 17 states and 25 transitions. Second operand 9 states. [2018-06-22 11:59:19,257 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:19,257 INFO ]: Finished difference Result 25 states and 43 transitions. [2018-06-22 11:59:19,282 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:59:19,282 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 11:59:19,282 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:19,283 INFO ]: With dead ends: 25 [2018-06-22 11:59:19,283 INFO ]: Without dead ends: 25 [2018-06-22 11:59:19,284 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:59:19,284 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 11:59:19,290 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 19. [2018-06-22 11:59:19,291 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 11:59:19,292 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2018-06-22 11:59:19,292 INFO ]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 13 [2018-06-22 11:59:19,292 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:19,292 INFO ]: Abstraction has 19 states and 29 transitions. [2018-06-22 11:59:19,292 INFO ]: Interpolant automaton has 9 states. [2018-06-22 11:59:19,292 INFO ]: Start isEmpty. Operand 19 states and 29 transitions. [2018-06-22 11:59:19,293 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:59:19,293 INFO ]: Found error trace [2018-06-22 11:59:19,293 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:19,293 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:19,293 INFO ]: Analyzing trace with hash 1758077595, now seen corresponding path program 1 times [2018-06-22 11:59:19,293 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:19,293 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:19,294 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:19,294 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:19,294 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:19,315 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:19,458 INFO ]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:59:19,458 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:19,458 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:59:19,467 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:19,496 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:19,499 INFO ]: Computing forward predicates... [2018-06-22 11:59:19,695 INFO ]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:59:19,718 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:19,718 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 11:59:19,719 INFO ]: Interpolant automaton has 12 states [2018-06-22 11:59:19,719 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 11:59:19,719 INFO ]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-06-22 11:59:19,719 INFO ]: Start difference. First operand 19 states and 29 transitions. Second operand 12 states. [2018-06-22 11:59:20,153 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:20,153 INFO ]: Finished difference Result 27 states and 47 transitions. [2018-06-22 11:59:20,154 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 11:59:20,154 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 11:59:20,154 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:20,155 INFO ]: With dead ends: 27 [2018-06-22 11:59:20,155 INFO ]: Without dead ends: 27 [2018-06-22 11:59:20,155 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-06-22 11:59:20,155 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 11:59:20,161 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-06-22 11:59:20,161 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 11:59:20,162 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 33 transitions. [2018-06-22 11:59:20,162 INFO ]: Start accepts. Automaton has 21 states and 33 transitions. Word has length 17 [2018-06-22 11:59:20,162 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:20,162 INFO ]: Abstraction has 21 states and 33 transitions. [2018-06-22 11:59:20,162 INFO ]: Interpolant automaton has 12 states. [2018-06-22 11:59:20,162 INFO ]: Start isEmpty. Operand 21 states and 33 transitions. [2018-06-22 11:59:20,163 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:59:20,163 INFO ]: Found error trace [2018-06-22 11:59:20,163 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:20,164 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:20,164 INFO ]: Analyzing trace with hash 949480467, now seen corresponding path program 2 times [2018-06-22 11:59:20,164 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:20,164 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:20,164 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:20,164 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:20,165 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:20,175 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:20,285 INFO ]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 11:59:20,285 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:20,285 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:59:20,300 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:59:20,325 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:59:20,326 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:20,327 INFO ]: Computing forward predicates... [2018-06-22 11:59:20,366 INFO ]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 11:59:20,393 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:20,393 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 11:59:20,393 INFO ]: Interpolant automaton has 9 states [2018-06-22 11:59:20,394 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 11:59:20,394 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:59:20,394 INFO ]: Start difference. First operand 21 states and 33 transitions. Second operand 9 states. [2018-06-22 11:59:20,504 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:20,504 INFO ]: Finished difference Result 27 states and 46 transitions. [2018-06-22 11:59:20,504 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:59:20,504 INFO ]: Start accepts. Automaton has 9 states. Word has length 17 [2018-06-22 11:59:20,505 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:20,505 INFO ]: With dead ends: 27 [2018-06-22 11:59:20,505 INFO ]: Without dead ends: 27 [2018-06-22 11:59:20,506 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-06-22 11:59:20,506 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 11:59:20,511 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-06-22 11:59:20,511 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 11:59:20,512 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 37 transitions. [2018-06-22 11:59:20,512 INFO ]: Start accepts. Automaton has 23 states and 37 transitions. Word has length 17 [2018-06-22 11:59:20,512 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:20,512 INFO ]: Abstraction has 23 states and 37 transitions. [2018-06-22 11:59:20,512 INFO ]: Interpolant automaton has 9 states. [2018-06-22 11:59:20,512 INFO ]: Start isEmpty. Operand 23 states and 37 transitions. [2018-06-22 11:59:20,514 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:59:20,514 INFO ]: Found error trace [2018-06-22 11:59:20,514 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:20,514 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:20,514 INFO ]: Analyzing trace with hash 941979939, now seen corresponding path program 2 times [2018-06-22 11:59:20,514 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:20,514 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:20,515 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:20,515 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:59:20,515 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:20,523 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:20,557 INFO ]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:59:20,557 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:20,557 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:59:20,562 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:59:20,574 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:59:20,574 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:20,575 INFO ]: Computing forward predicates... [2018-06-22 11:59:20,597 INFO ]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:59:20,616 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:20,616 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 11:59:20,617 INFO ]: Interpolant automaton has 7 states [2018-06-22 11:59:20,617 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 11:59:20,617 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:59:20,617 INFO ]: Start difference. First operand 23 states and 37 transitions. Second operand 7 states. [2018-06-22 11:59:20,767 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:20,767 INFO ]: Finished difference Result 44 states and 69 transitions. [2018-06-22 11:59:20,769 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 11:59:20,769 INFO ]: Start accepts. Automaton has 7 states. Word has length 17 [2018-06-22 11:59:20,769 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:20,770 INFO ]: With dead ends: 44 [2018-06-22 11:59:20,770 INFO ]: Without dead ends: 36 [2018-06-22 11:59:20,770 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2018-06-22 11:59:20,771 INFO ]: Start minimizeSevpa. Operand 36 states. [2018-06-22 11:59:20,778 INFO ]: Finished minimizeSevpa. Reduced states from 36 to 28. [2018-06-22 11:59:20,778 INFO ]: Start removeUnreachable. Operand 28 states. [2018-06-22 11:59:20,779 INFO ]: Finished removeUnreachable. Reduced from 28 states to 28 states and 45 transitions. [2018-06-22 11:59:20,779 INFO ]: Start accepts. Automaton has 28 states and 45 transitions. Word has length 17 [2018-06-22 11:59:20,779 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:20,779 INFO ]: Abstraction has 28 states and 45 transitions. [2018-06-22 11:59:20,779 INFO ]: Interpolant automaton has 7 states. [2018-06-22 11:59:20,779 INFO ]: Start isEmpty. Operand 28 states and 45 transitions. [2018-06-22 11:59:20,781 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:59:20,781 INFO ]: Found error trace [2018-06-22 11:59:20,782 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:20,782 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:20,782 INFO ]: Analyzing trace with hash -2115360898, now seen corresponding path program 1 times [2018-06-22 11:59:20,782 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:20,782 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:20,783 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:20,783 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:59:20,783 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:20,789 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:20,827 INFO ]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:59:20,828 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:59:20,828 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:59:20,828 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:59:20,828 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:59:20,828 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:59:20,828 INFO ]: Start difference. First operand 28 states and 45 transitions. Second operand 4 states. [2018-06-22 11:59:20,866 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:20,866 INFO ]: Finished difference Result 43 states and 68 transitions. [2018-06-22 11:59:20,866 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 11:59:20,866 INFO ]: Start accepts. Automaton has 4 states. Word has length 17 [2018-06-22 11:59:20,866 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:20,867 INFO ]: With dead ends: 43 [2018-06-22 11:59:20,867 INFO ]: Without dead ends: 35 [2018-06-22 11:59:20,867 INFO ]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:59:20,867 INFO ]: Start minimizeSevpa. Operand 35 states. [2018-06-22 11:59:20,873 INFO ]: Finished minimizeSevpa. Reduced states from 35 to 33. [2018-06-22 11:59:20,873 INFO ]: Start removeUnreachable. Operand 33 states. [2018-06-22 11:59:20,874 INFO ]: Finished removeUnreachable. Reduced from 33 states to 33 states and 50 transitions. [2018-06-22 11:59:20,874 INFO ]: Start accepts. Automaton has 33 states and 50 transitions. Word has length 17 [2018-06-22 11:59:20,875 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:20,875 INFO ]: Abstraction has 33 states and 50 transitions. [2018-06-22 11:59:20,875 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:59:20,875 INFO ]: Start isEmpty. Operand 33 states and 50 transitions. [2018-06-22 11:59:20,876 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:59:20,876 INFO ]: Found error trace [2018-06-22 11:59:20,876 INFO ]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:20,876 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:20,876 INFO ]: Analyzing trace with hash 349844541, now seen corresponding path program 2 times [2018-06-22 11:59:20,876 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:20,876 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:20,877 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:20,877 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:20,877 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:20,888 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:21,121 INFO ]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:59:21,122 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:21,122 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:59:21,127 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:59:21,151 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:59:21,151 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:21,154 INFO ]: Computing forward predicates... [2018-06-22 11:59:21,283 INFO ]: Checked inductivity of 19 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 11:59:21,304 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:21,304 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2018-06-22 11:59:21,304 INFO ]: Interpolant automaton has 15 states [2018-06-22 11:59:21,304 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 11:59:21,304 INFO ]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-06-22 11:59:21,304 INFO ]: Start difference. First operand 33 states and 50 transitions. Second operand 15 states. [2018-06-22 11:59:21,815 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:21,815 INFO ]: Finished difference Result 45 states and 70 transitions. [2018-06-22 11:59:21,816 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 11:59:21,816 INFO ]: Start accepts. Automaton has 15 states. Word has length 21 [2018-06-22 11:59:21,816 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:21,817 INFO ]: With dead ends: 45 [2018-06-22 11:59:21,817 INFO ]: Without dead ends: 45 [2018-06-22 11:59:21,818 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2018-06-22 11:59:21,818 INFO ]: Start minimizeSevpa. Operand 45 states. [2018-06-22 11:59:21,829 INFO ]: Finished minimizeSevpa. Reduced states from 45 to 31. [2018-06-22 11:59:21,830 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 11:59:21,830 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 47 transitions. [2018-06-22 11:59:21,830 INFO ]: Start accepts. Automaton has 31 states and 47 transitions. Word has length 21 [2018-06-22 11:59:21,831 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:21,831 INFO ]: Abstraction has 31 states and 47 transitions. [2018-06-22 11:59:21,831 INFO ]: Interpolant automaton has 15 states. [2018-06-22 11:59:21,831 INFO ]: Start isEmpty. Operand 31 states and 47 transitions. [2018-06-22 11:59:21,831 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:59:21,832 INFO ]: Found error trace [2018-06-22 11:59:21,832 INFO ]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:21,832 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:21,832 INFO ]: Analyzing trace with hash 22603973, now seen corresponding path program 3 times [2018-06-22 11:59:21,832 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:21,832 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:21,833 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:21,833 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:59:21,833 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:21,841 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:21,891 INFO ]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:59:21,891 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:21,891 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:59:21,899 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:59:21,914 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 11:59:21,914 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:21,916 INFO ]: Computing forward predicates... [2018-06-22 11:59:21,954 INFO ]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 11:59:21,973 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:21,973 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 11:59:21,973 INFO ]: Interpolant automaton has 9 states [2018-06-22 11:59:21,974 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 11:59:21,974 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:59:21,974 INFO ]: Start difference. First operand 31 states and 47 transitions. Second operand 9 states. [2018-06-22 11:59:22,114 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:22,114 INFO ]: Finished difference Result 19 states and 25 transitions. [2018-06-22 11:59:22,114 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 11:59:22,114 INFO ]: Start accepts. Automaton has 9 states. Word has length 21 [2018-06-22 11:59:22,115 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:22,115 INFO ]: With dead ends: 19 [2018-06-22 11:59:22,115 INFO ]: Without dead ends: 0 [2018-06-22 11:59:22,115 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2018-06-22 11:59:22,115 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 11:59:22,115 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 11:59:22,115 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 11:59:22,115 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 11:59:22,115 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 11:59:22,115 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:22,115 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 11:59:22,115 INFO ]: Interpolant automaton has 9 states. [2018-06-22 11:59:22,115 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 11:59:22,115 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 11:59:22,119 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:59:22 BoogieIcfgContainer [2018-06-22 11:59:22,119 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:59:22,120 INFO ]: Toolchain (without parser) took 5756.91 ms. Allocated memory was 305.1 MB in the beginning and 363.3 MB in the end (delta: 58.2 MB). Free memory was 261.5 MB in the beginning and 334.7 MB in the end (delta: -73.2 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:59:22,122 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 305.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:59:22,122 INFO ]: ChcToBoogie took 49.74 ms. Allocated memory is still 305.1 MB. Free memory was 261.5 MB in the beginning and 259.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:59:22,123 INFO ]: Boogie Preprocessor took 39.22 ms. Allocated memory is still 305.1 MB. Free memory was 259.5 MB in the beginning and 257.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:59:22,123 INFO ]: RCFGBuilder took 199.18 ms. Allocated memory is still 305.1 MB. Free memory was 257.5 MB in the beginning and 249.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:59:22,123 INFO ]: TraceAbstraction took 5460.35 ms. Allocated memory was 305.1 MB in the beginning and 363.3 MB in the end (delta: 58.2 MB). Free memory was 249.5 MB in the beginning and 334.7 MB in the end (delta: -85.1 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:59:22,126 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 305.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 49.74 ms. Allocated memory is still 305.1 MB. Free memory was 261.5 MB in the beginning and 259.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 39.22 ms. Allocated memory is still 305.1 MB. Free memory was 259.5 MB in the beginning and 257.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 199.18 ms. Allocated memory is still 305.1 MB. Free memory was 257.5 MB in the beginning and 249.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 5460.35 ms. Allocated memory was 305.1 MB in the beginning and 363.3 MB in the end (delta: 58.2 MB). Free memory was 249.5 MB in the beginning and 334.7 MB in the end (delta: -85.1 MB). There was no memory consumed. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. SAFE Result, 5.4s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 2.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 176 SDtfs, 47 SDslu, 404 SDs, 0 SdLazy, 718 SolverSat, 74 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 201 GetRequests, 110 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=8, 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, 10 MinimizatonAttempts, 46 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 277 NumberOfCodeBlocks, 275 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 260 ConstructedInterpolants, 0 QuantifiedInterpolants, 17880 SizeOfPredicates, 40 NumberOfNonLiveVariables, 635 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 89/158 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__fib.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-59-22-136.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__fib.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-59-22-136.csv Received shutdown request...