java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/hopv/lia/mochi/fib.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 21:18:30,888 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 21:18:30,891 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 21:18:30,902 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 21:18:30,903 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 21:18:30,903 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 21:18:30,904 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 21:18:30,908 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 21:18:30,910 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 21:18:30,910 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 21:18:30,912 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 21:18:30,912 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 21:18:30,913 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 21:18:30,914 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 21:18:30,915 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 21:18:30,915 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 21:18:30,920 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 21:18:30,932 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 21:18:30,933 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 21:18:30,934 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 21:18:30,935 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 21:18:30,937 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-06-24 21:18:30,945 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 21:18:30,958 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 21:18:30,958 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 21:18:30,958 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 21:18:30,959 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 21:18:30,959 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 21:18:30,960 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 21:18:30,960 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 21:18:30,960 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 21:18:30,960 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 21:18:30,960 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 21:18:30,961 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 21:18:30,961 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 21:18:30,961 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:18:30,961 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 21:18:30,961 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 21:18:30,962 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 21:18:30,962 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 21:18:30,962 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 21:18:30,962 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 21:18:30,962 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 21:18:30,962 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 21:18:30,964 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 21:18:30,964 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 21:18:31,011 INFO ]: Repository-Root is: /tmp [2018-06-24 21:18:31,031 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 21:18:31,039 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 21:18:31,040 INFO ]: Initializing SmtParser... [2018-06-24 21:18:31,040 INFO ]: SmtParser initialized [2018-06-24 21:18:31,041 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/mochi/fib.smt2 [2018-06-24 21:18:31,042 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 [2018-06-24 21:18:31,131 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/mochi/fib.smt2 unknown [2018-06-24 21:18:31,273 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/mochi/fib.smt2 [2018-06-24 21:18:31,277 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 21:18:31,288 INFO ]: Walking toolchain with 5 elements. [2018-06-24 21:18:31,288 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 21:18:31,288 INFO ]: Initializing ChcToBoogie... [2018-06-24 21:18:31,288 INFO ]: ChcToBoogie initialized [2018-06-24 21:18:31,293 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:18:31" (1/1) ... [2018-06-24 21:18:31,346 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:18:31 Unit [2018-06-24 21:18:31,347 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 21:18:31,347 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 21:18:31,347 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 21:18:31,347 INFO ]: Boogie Preprocessor initialized [2018-06-24 21:18:31,367 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:18:31" (1/1) ... [2018-06-24 21:18:31,367 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:18:31" (1/1) ... [2018-06-24 21:18:31,373 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:18:31" (1/1) ... [2018-06-24 21:18:31,373 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:18:31" (1/1) ... [2018-06-24 21:18:31,375 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:18:31" (1/1) ... [2018-06-24 21:18:31,377 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:18:31" (1/1) ... [2018-06-24 21:18:31,378 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:18:31" (1/1) ... [2018-06-24 21:18:31,379 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 21:18:31,380 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 21:18:31,380 INFO ]: Initializing RCFGBuilder... [2018-06-24 21:18:31,380 INFO ]: RCFGBuilder initialized [2018-06-24 21:18:31,381 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:18:31" (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) [2018-06-24 21:18:31,399 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 21:18:31,399 INFO ]: Found specification of procedure gotoProc [2018-06-24 21:18:31,399 INFO ]: Found implementation of procedure gotoProc [2018-06-24 21:18:31,399 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 21:18:31,399 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 21:18:31,399 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 [2018-06-24 21:18:31,657 INFO ]: Using library mode [2018-06-24 21:18:31,658 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:18:31 BoogieIcfgContainer [2018-06-24 21:18:31,658 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 21:18:31,658 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 21:18:31,658 INFO ]: Initializing BlockEncodingV2... [2018-06-24 21:18:31,659 INFO ]: BlockEncodingV2 initialized [2018-06-24 21:18:31,660 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:18:31" (1/1) ... [2018-06-24 21:18:31,673 INFO ]: Initial Icfg 13 locations, 16 edges [2018-06-24 21:18:31,674 INFO ]: Using Remove infeasible edges [2018-06-24 21:18:31,675 INFO ]: Using Maximize final states [2018-06-24 21:18:31,675 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 21:18:31,675 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 21:18:31,677 INFO ]: Using Remove sink states [2018-06-24 21:18:31,678 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 21:18:31,678 INFO ]: Using Use SBE [2018-06-24 21:18:31,684 INFO ]: SBE split 0 edges [2018-06-24 21:18:31,689 INFO ]: Removed 3 edges and 2 locations because of local infeasibility [2018-06-24 21:18:31,690 INFO ]: 0 new accepting states [2018-06-24 21:18:31,737 INFO ]: Removed 7 edges and 3 locations by large block encoding [2018-06-24 21:18:31,739 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:18:31,740 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 21:18:31,740 INFO ]: 0 new accepting states [2018-06-24 21:18:31,741 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 21:18:31,741 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:18:31,741 INFO ]: Encoded RCFG 8 locations, 10 edges [2018-06-24 21:18:31,741 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:18:31 BasicIcfg [2018-06-24 21:18:31,741 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 21:18:31,742 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 21:18:31,742 INFO ]: Initializing TraceAbstraction... [2018-06-24 21:18:31,747 INFO ]: TraceAbstraction initialized [2018-06-24 21:18:31,747 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:18:31" (1/4) ... [2018-06-24 21:18:31,748 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294a4154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 09:18:31, skipping insertion in model container [2018-06-24 21:18:31,748 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:18:31" (2/4) ... [2018-06-24 21:18:31,749 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294a4154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 09:18:31, skipping insertion in model container [2018-06-24 21:18:31,751 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:18:31" (3/4) ... [2018-06-24 21:18:31,751 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294a4154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:18:31, skipping insertion in model container [2018-06-24 21:18:31,751 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:18:31" (4/4) ... [2018-06-24 21:18:31,754 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 21:18:31,766 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 21:18:31,777 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 21:18:31,813 INFO ]: Using default assertion order modulation [2018-06-24 21:18:31,814 INFO ]: Interprodecural is true [2018-06-24 21:18:31,814 INFO ]: Hoare is false [2018-06-24 21:18:31,814 INFO ]: Compute interpolants for FPandBP [2018-06-24 21:18:31,814 INFO ]: Backedges is TWOTRACK [2018-06-24 21:18:31,814 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 21:18:31,814 INFO ]: Difference is false [2018-06-24 21:18:31,814 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 21:18:31,814 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 21:18:31,823 INFO ]: Start isEmpty. Operand 8 states. [2018-06-24 21:18:31,833 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:18:31,833 INFO ]: Found error trace [2018-06-24 21:18:31,834 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:18:31,835 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:18:31,839 INFO ]: Analyzing trace with hash 33742116, now seen corresponding path program 1 times [2018-06-24 21:18:31,840 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:18:31,840 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:18:31,876 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:18:31,876 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:18:31,876 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:18:31,906 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:18:32,015 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:18:32,018 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:18:32,018 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:18:32,020 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:18:32,035 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:18:32,035 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:18:32,042 INFO ]: Start difference. First operand 8 states. Second operand 3 states. [2018-06-24 21:18:32,156 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:18:32,156 INFO ]: Finished difference Result 13 states and 17 transitions. [2018-06-24 21:18:32,156 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:18:32,158 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:18:32,158 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:18:32,165 INFO ]: With dead ends: 13 [2018-06-24 21:18:32,165 INFO ]: Without dead ends: 13 [2018-06-24 21:18:32,166 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:18:32,178 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-24 21:18:32,197 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-24 21:18:32,198 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-24 21:18:32,199 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2018-06-24 21:18:32,200 INFO ]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 5 [2018-06-24 21:18:32,201 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:18:32,201 INFO ]: Abstraction has 13 states and 17 transitions. [2018-06-24 21:18:32,201 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:18:32,201 INFO ]: Start isEmpty. Operand 13 states and 17 transitions. [2018-06-24 21:18:32,202 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:18:32,202 INFO ]: Found error trace [2018-06-24 21:18:32,202 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:18:32,202 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:18:32,202 INFO ]: Analyzing trace with hash 33801698, now seen corresponding path program 1 times [2018-06-24 21:18:32,202 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:18:32,202 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:18:32,203 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:18:32,203 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:18:32,203 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:18:32,209 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:18:32,261 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:18:32,261 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:18:32,261 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:18:32,263 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:18:32,263 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:18:32,263 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:18:32,264 INFO ]: Start difference. First operand 13 states and 17 transitions. Second operand 3 states. [2018-06-24 21:18:32,299 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:18:32,299 INFO ]: Finished difference Result 19 states and 25 transitions. [2018-06-24 21:18:32,300 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:18:32,300 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:18:32,300 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:18:32,301 INFO ]: With dead ends: 19 [2018-06-24 21:18:32,301 INFO ]: Without dead ends: 19 [2018-06-24 21:18:32,301 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:18:32,301 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-24 21:18:32,305 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-06-24 21:18:32,305 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-24 21:18:32,306 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2018-06-24 21:18:32,306 INFO ]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 5 [2018-06-24 21:18:32,306 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:18:32,306 INFO ]: Abstraction has 15 states and 19 transitions. [2018-06-24 21:18:32,306 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:18:32,306 INFO ]: Start isEmpty. Operand 15 states and 19 transitions. [2018-06-24 21:18:32,307 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-24 21:18:32,307 INFO ]: Found error trace [2018-06-24 21:18:32,308 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:18:32,308 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:18:32,308 INFO ]: Analyzing trace with hash -256707234, now seen corresponding path program 1 times [2018-06-24 21:18:32,308 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:18:32,308 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:18:32,309 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:18:32,309 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:18:32,309 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:18:32,329 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:18:32,505 INFO ]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:18:32,505 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:18:32,505 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 [2018-06-24 21:18:32,513 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:18:32,548 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:18:32,558 INFO ]: Computing forward predicates... [2018-06-24 21:18:32,718 INFO ]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:18:32,738 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:18:32,739 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-24 21:18:32,739 INFO ]: Interpolant automaton has 10 states [2018-06-24 21:18:32,739 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-24 21:18:32,739 INFO ]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-06-24 21:18:32,739 INFO ]: Start difference. First operand 15 states and 19 transitions. Second operand 10 states. [2018-06-24 21:18:33,078 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-06-24 21:18:33,818 WARN ]: Spent 251.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2018-06-24 21:18:34,127 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:18:34,127 INFO ]: Finished difference Result 40 states and 61 transitions. [2018-06-24 21:18:34,127 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-24 21:18:34,127 INFO ]: Start accepts. Automaton has 10 states. Word has length 11 [2018-06-24 21:18:34,128 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:18:34,130 INFO ]: With dead ends: 40 [2018-06-24 21:18:34,130 INFO ]: Without dead ends: 33 [2018-06-24 21:18:34,130 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2018-06-24 21:18:34,130 INFO ]: Start minimizeSevpa. Operand 33 states. [2018-06-24 21:18:34,137 INFO ]: Finished minimizeSevpa. Reduced states from 33 to 21. [2018-06-24 21:18:34,138 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-24 21:18:34,139 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2018-06-24 21:18:34,139 INFO ]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 11 [2018-06-24 21:18:34,139 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:18:34,139 INFO ]: Abstraction has 21 states and 30 transitions. [2018-06-24 21:18:34,139 INFO ]: Interpolant automaton has 10 states. [2018-06-24 21:18:34,139 INFO ]: Start isEmpty. Operand 21 states and 30 transitions. [2018-06-24 21:18:34,140 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-24 21:18:34,140 INFO ]: Found error trace [2018-06-24 21:18:34,140 INFO ]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2018-06-24 21:18:34,140 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:18:34,140 INFO ]: Analyzing trace with hash -68005406, now seen corresponding path program 2 times [2018-06-24 21:18:34,140 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:18:34,140 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:18:34,141 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:18:34,141 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:18:34,141 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:18:34,161 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:18:34,293 INFO ]: Checked inductivity of 18 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-24 21:18:34,293 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:18:34,293 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:18:34,302 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:18:34,336 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:18:34,336 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:18:34,339 INFO ]: Computing forward predicates... [2018-06-24 21:18:34,474 INFO ]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-24 21:18:34,493 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:18:34,493 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2018-06-24 21:18:34,493 INFO ]: Interpolant automaton has 17 states [2018-06-24 21:18:34,493 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-24 21:18:34,493 INFO ]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-06-24 21:18:34,494 INFO ]: Start difference. First operand 21 states and 30 transitions. Second operand 17 states. [2018-06-24 21:18:35,341 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:18:35,341 INFO ]: Finished difference Result 37 states and 65 transitions. [2018-06-24 21:18:35,342 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-06-24 21:18:35,342 INFO ]: Start accepts. Automaton has 17 states. Word has length 17 [2018-06-24 21:18:35,342 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:18:35,342 INFO ]: With dead ends: 37 [2018-06-24 21:18:35,342 INFO ]: Without dead ends: 0 [2018-06-24 21:18:35,343 INFO ]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2018-06-24 21:18:35,343 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-24 21:18:35,343 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-24 21:18:35,343 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-24 21:18:35,343 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-24 21:18:35,343 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-06-24 21:18:35,343 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:18:35,343 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-24 21:18:35,343 INFO ]: Interpolant automaton has 17 states. [2018-06-24 21:18:35,343 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-24 21:18:35,343 INFO ]: Finished isEmpty. No accepting run. [2018-06-24 21:18:35,345 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 21:18:35,347 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:18:35 BasicIcfg [2018-06-24 21:18:35,347 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 21:18:35,347 INFO ]: Toolchain (without parser) took 4069.66 ms. Allocated memory was 309.3 MB in the beginning and 338.7 MB in the end (delta: 29.4 MB). Free memory was 265.7 MB in the beginning and 269.2 MB in the end (delta: -3.5 MB). Peak memory consumption was 25.9 MB. Max. memory is 3.6 GB. [2018-06-24 21:18:35,348 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:18:35,349 INFO ]: ChcToBoogie took 58.67 ms. Allocated memory is still 309.3 MB. Free memory was 265.7 MB in the beginning and 263.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:18:35,349 INFO ]: Boogie Preprocessor took 31.96 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:18:35,350 INFO ]: RCFGBuilder took 278.27 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 255.7 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:18:35,351 INFO ]: BlockEncodingV2 took 83.13 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 253.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:18:35,351 INFO ]: TraceAbstraction took 3604.68 ms. Allocated memory was 309.3 MB in the beginning and 338.7 MB in the end (delta: 29.4 MB). Free memory was 251.8 MB in the beginning and 269.2 MB in the end (delta: -17.4 MB). Peak memory consumption was 11.9 MB. Max. memory is 3.6 GB. [2018-06-24 21:18:35,356 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 13 locations, 16 edges - StatisticsResult: Encoded RCFG 8 locations, 10 edges * 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 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.67 ms. Allocated memory is still 309.3 MB. Free memory was 265.7 MB in the beginning and 263.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 31.96 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 278.27 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 255.7 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 83.13 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 253.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3604.68 ms. Allocated memory was 309.3 MB in the beginning and 338.7 MB in the end (delta: 29.4 MB). Free memory was 251.8 MB in the beginning and 269.2 MB in the end (delta: -17.4 MB). Peak memory consumption was 11.9 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 8 locations, 1 error locations. SAFE Result, 3.5s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 2.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 35 SDtfs, 43 SDslu, 43 SDs, 0 SdLazy, 430 SolverSat, 129 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=3, 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, 4 MinimizatonAttempts, 16 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 2976 SizeOfPredicates, 21 NumberOfNonLiveVariables, 154 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 17/46 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/fib.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_21-18-35-369.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fib.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_21-18-35-369.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fib.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_21-18-35-369.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fib.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_21-18-35-369.csv Received shutdown request...