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/repeat4.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 21:23:40,887 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 21:23:40,889 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 21:23:40,902 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 21:23:40,902 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 21:23:40,904 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 21:23:40,905 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 21:23:40,909 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 21:23:40,911 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 21:23:40,911 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 21:23:40,913 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 21:23:40,913 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 21:23:40,914 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 21:23:40,916 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 21:23:40,916 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 21:23:40,919 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 21:23:40,921 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 21:23:40,933 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 21:23:40,935 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 21:23:40,936 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 21:23:40,937 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 21:23:40,939 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-06-24 21:23:40,949 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-24 21:23:40,950 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-24 21:23:40,950 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-24 21:23:40,950 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-24 21:23:40,951 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-24 21:23:40,952 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-24 21:23:40,956 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 21:23:40,979 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 21:23:40,980 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 21:23:40,980 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 21:23:40,980 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 21:23:40,981 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 21:23:40,981 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 21:23:40,981 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 21:23:40,983 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 21:23:40,983 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 21:23:40,983 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 21:23:40,984 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 21:23:40,984 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 21:23:40,984 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:23:40,984 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 21:23:40,984 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 21:23:40,985 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 21:23:40,985 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 21:23:40,985 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 21:23:40,985 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 21:23:40,985 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 21:23:40,985 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 21:23:40,988 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 21:23:40,988 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 21:23:41,043 INFO ]: Repository-Root is: /tmp [2018-06-24 21:23:41,063 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 21:23:41,066 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 21:23:41,068 INFO ]: Initializing SmtParser... [2018-06-24 21:23:41,068 INFO ]: SmtParser initialized [2018-06-24 21:23:41,069 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/mochi/repeat4.smt2 [2018-06-24 21:23:41,070 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 21:23:41,162 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/mochi/repeat4.smt2 unknown [2018-06-24 21:23:41,335 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/mochi/repeat4.smt2 [2018-06-24 21:23:41,340 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 21:23:41,345 INFO ]: Walking toolchain with 5 elements. [2018-06-24 21:23:41,346 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 21:23:41,346 INFO ]: Initializing ChcToBoogie... [2018-06-24 21:23:41,346 INFO ]: ChcToBoogie initialized [2018-06-24 21:23:41,352 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:23:41" (1/1) ... [2018-06-24 21:23:41,404 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:23:41 Unit [2018-06-24 21:23:41,404 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 21:23:41,405 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 21:23:41,405 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 21:23:41,405 INFO ]: Boogie Preprocessor initialized [2018-06-24 21:23:41,425 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:23:41" (1/1) ... [2018-06-24 21:23:41,426 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:23:41" (1/1) ... [2018-06-24 21:23:41,431 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:23:41" (1/1) ... [2018-06-24 21:23:41,431 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:23:41" (1/1) ... [2018-06-24 21:23:41,433 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:23:41" (1/1) ... [2018-06-24 21:23:41,436 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:23:41" (1/1) ... [2018-06-24 21:23:41,436 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:23:41" (1/1) ... [2018-06-24 21:23:41,437 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 21:23:41,438 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 21:23:41,438 INFO ]: Initializing RCFGBuilder... [2018-06-24 21:23:41,438 INFO ]: RCFGBuilder initialized [2018-06-24 21:23:41,440 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:23:41" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:23:41,449 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 21:23:41,449 INFO ]: Found specification of procedure gotoProc [2018-06-24 21:23:41,449 INFO ]: Found implementation of procedure gotoProc [2018-06-24 21:23:41,449 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 21:23:41,449 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 21:23:41,449 INFO ]: Found implementation of procedure Ultimate.START [2018-06-24 21:23:41,685 INFO ]: Using library mode [2018-06-24 21:23:41,685 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:23:41 BoogieIcfgContainer [2018-06-24 21:23:41,685 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 21:23:41,685 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 21:23:41,685 INFO ]: Initializing BlockEncodingV2... [2018-06-24 21:23:41,686 INFO ]: BlockEncodingV2 initialized [2018-06-24 21:23:41,687 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:23:41" (1/1) ... [2018-06-24 21:23:41,701 INFO ]: Initial Icfg 15 locations, 18 edges [2018-06-24 21:23:41,702 INFO ]: Using Remove infeasible edges [2018-06-24 21:23:41,702 INFO ]: Using Maximize final states [2018-06-24 21:23:41,703 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 21:23:41,703 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 21:23:41,707 INFO ]: Using Remove sink states [2018-06-24 21:23:41,708 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 21:23:41,708 INFO ]: Using Use SBE [2018-06-24 21:23:41,718 INFO ]: SBE split 0 edges [2018-06-24 21:23:41,729 INFO ]: Removed 3 edges and 2 locations because of local infeasibility [2018-06-24 21:23:41,730 INFO ]: 0 new accepting states [2018-06-24 21:23:41,899 INFO ]: Removed 18 edges and 6 locations by large block encoding [2018-06-24 21:23:41,901 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:23:41,902 INFO ]: Removed 1 edges and 0 locations because of local infeasibility [2018-06-24 21:23:41,902 INFO ]: 0 new accepting states [2018-06-24 21:23:41,903 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 21:23:41,903 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:23:41,903 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 21:23:41,903 INFO ]: 0 new accepting states [2018-06-24 21:23:41,903 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 21:23:41,904 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:23:41,904 INFO ]: Encoded RCFG 7 locations, 9 edges [2018-06-24 21:23:41,904 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:23:41 BasicIcfg [2018-06-24 21:23:41,904 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 21:23:41,905 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 21:23:41,905 INFO ]: Initializing TraceAbstraction... [2018-06-24 21:23:41,908 INFO ]: TraceAbstraction initialized [2018-06-24 21:23:41,908 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:23:41" (1/4) ... [2018-06-24 21:23:41,909 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669162a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 09:23:41, skipping insertion in model container [2018-06-24 21:23:41,909 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:23:41" (2/4) ... [2018-06-24 21:23:41,909 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669162a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 09:23:41, skipping insertion in model container [2018-06-24 21:23:41,909 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:23:41" (3/4) ... [2018-06-24 21:23:41,910 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669162a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:23:41, skipping insertion in model container [2018-06-24 21:23:41,910 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:23:41" (4/4) ... [2018-06-24 21:23:41,912 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 21:23:41,924 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 21:23:41,931 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 21:23:41,967 INFO ]: Using default assertion order modulation [2018-06-24 21:23:41,968 INFO ]: Interprodecural is true [2018-06-24 21:23:41,968 INFO ]: Hoare is false [2018-06-24 21:23:41,968 INFO ]: Compute interpolants for FPandBP [2018-06-24 21:23:41,968 INFO ]: Backedges is TWOTRACK [2018-06-24 21:23:41,968 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 21:23:41,968 INFO ]: Difference is false [2018-06-24 21:23:41,968 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 21:23:41,968 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 21:23:41,981 INFO ]: Start isEmpty. Operand 7 states. [2018-06-24 21:23:42,000 INFO ]: Finished isEmpty. Found accepting run of length 5 [2018-06-24 21:23:42,000 INFO ]: Found error trace [2018-06-24 21:23:42,001 INFO ]: trace histogram [1, 1, 1, 1] [2018-06-24 21:23:42,001 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:23:42,005 INFO ]: Analyzing trace with hash 1068211, now seen corresponding path program 1 times [2018-06-24 21:23:42,006 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:23:42,006 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:23:42,043 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:23:42,043 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:23:42,043 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:23:42,076 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:23:42,132 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:23:42,134 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:23:42,134 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:23:42,136 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:23:42,147 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:23:42,147 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:23:42,149 INFO ]: Start difference. First operand 7 states. Second operand 3 states. [2018-06-24 21:23:42,238 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:23:42,238 INFO ]: Finished difference Result 11 states and 15 transitions. [2018-06-24 21:23:42,238 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:23:42,239 INFO ]: Start accepts. Automaton has 3 states. Word has length 4 [2018-06-24 21:23:42,239 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:23:42,246 INFO ]: With dead ends: 11 [2018-06-24 21:23:42,246 INFO ]: Without dead ends: 11 [2018-06-24 21:23:42,247 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 21:23:42,259 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-24 21:23:42,280 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-24 21:23:42,283 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-24 21:23:42,284 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2018-06-24 21:23:42,285 INFO ]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 4 [2018-06-24 21:23:42,286 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:23:42,286 INFO ]: Abstraction has 11 states and 15 transitions. [2018-06-24 21:23:42,286 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:23:42,286 INFO ]: Start isEmpty. Operand 11 states and 15 transitions. [2018-06-24 21:23:42,287 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-24 21:23:42,287 INFO ]: Found error trace [2018-06-24 21:23:42,287 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:23:42,288 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:23:42,288 INFO ]: Analyzing trace with hash 1033509678, now seen corresponding path program 1 times [2018-06-24 21:23:42,288 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:23:42,288 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:23:42,289 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:23:42,289 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:23:42,289 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:23:42,313 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:23:42,430 INFO ]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:23:42,430 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:23:42,430 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-06-24 21:23:42,431 INFO ]: Interpolant automaton has 5 states [2018-06-24 21:23:42,431 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-24 21:23:42,431 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-24 21:23:42,432 INFO ]: Start difference. First operand 11 states and 15 transitions. Second operand 5 states. [2018-06-24 21:23:42,761 WARN ]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-24 21:23:42,852 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:23:42,852 INFO ]: Finished difference Result 16 states and 20 transitions. [2018-06-24 21:23:42,853 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-24 21:23:42,853 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-24 21:23:42,853 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:23:42,854 INFO ]: With dead ends: 16 [2018-06-24 21:23:42,854 INFO ]: Without dead ends: 14 [2018-06-24 21:23:42,855 INFO ]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-24 21:23:42,855 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-24 21:23:42,858 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-06-24 21:23:42,858 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-24 21:23:42,859 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2018-06-24 21:23:42,859 INFO ]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 8 [2018-06-24 21:23:42,859 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:23:42,859 INFO ]: Abstraction has 13 states and 17 transitions. [2018-06-24 21:23:42,859 INFO ]: Interpolant automaton has 5 states. [2018-06-24 21:23:42,859 INFO ]: Start isEmpty. Operand 13 states and 17 transitions. [2018-06-24 21:23:42,860 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-24 21:23:42,860 INFO ]: Found error trace [2018-06-24 21:23:42,860 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-06-24 21:23:42,860 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:23:42,860 INFO ]: Analyzing trace with hash -1635103898, now seen corresponding path program 1 times [2018-06-24 21:23:42,860 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:23:42,860 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:23:42,861 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:23:42,861 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:23:42,861 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:23:42,892 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:23:43,143 INFO ]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-24 21:23:43,143 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:23:43,143 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 21:23:43,151 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:23:43,186 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:23:43,194 INFO ]: Computing forward predicates... [2018-06-24 21:23:43,331 INFO ]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-24 21:23:43,350 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:23:43,350 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-24 21:23:43,350 INFO ]: Interpolant automaton has 10 states [2018-06-24 21:23:43,351 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-24 21:23:43,351 INFO ]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-06-24 21:23:43,351 INFO ]: Start difference. First operand 13 states and 17 transitions. Second operand 10 states. [2018-06-24 21:23:43,837 WARN ]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-06-24 21:23:44,092 WARN ]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-24 21:23:44,157 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:23:44,157 INFO ]: Finished difference Result 18 states and 22 transitions. [2018-06-24 21:23:44,158 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-24 21:23:44,158 INFO ]: Start accepts. Automaton has 10 states. Word has length 12 [2018-06-24 21:23:44,158 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:23:44,158 INFO ]: With dead ends: 18 [2018-06-24 21:23:44,158 INFO ]: Without dead ends: 16 [2018-06-24 21:23:44,159 INFO ]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-06-24 21:23:44,159 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-24 21:23:44,161 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-06-24 21:23:44,161 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-24 21:23:44,162 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2018-06-24 21:23:44,162 INFO ]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 12 [2018-06-24 21:23:44,162 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:23:44,162 INFO ]: Abstraction has 15 states and 19 transitions. [2018-06-24 21:23:44,162 INFO ]: Interpolant automaton has 10 states. [2018-06-24 21:23:44,162 INFO ]: Start isEmpty. Operand 15 states and 19 transitions. [2018-06-24 21:23:44,163 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-24 21:23:44,163 INFO ]: Found error trace [2018-06-24 21:23:44,163 INFO ]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1] [2018-06-24 21:23:44,163 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:23:44,163 INFO ]: Analyzing trace with hash 1884563614, now seen corresponding path program 2 times [2018-06-24 21:23:44,163 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:23:44,163 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:23:44,164 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:23:44,164 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:23:44,164 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:23:44,185 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:23:44,379 INFO ]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-24 21:23:44,380 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:23:44,380 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 21:23:44,390 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:23:44,436 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:23:44,436 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:23:44,440 INFO ]: Computing forward predicates... [2018-06-24 21:23:44,593 INFO ]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-24 21:23:44,612 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:23:44,613 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2018-06-24 21:23:44,613 INFO ]: Interpolant automaton has 13 states [2018-06-24 21:23:44,613 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-24 21:23:44,613 INFO ]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-06-24 21:23:44,613 INFO ]: Start difference. First operand 15 states and 19 transitions. Second operand 13 states. [2018-06-24 21:23:44,980 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:23:44,980 INFO ]: Finished difference Result 17 states and 20 transitions. [2018-06-24 21:23:44,980 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-24 21:23:44,980 INFO ]: Start accepts. Automaton has 13 states. Word has length 16 [2018-06-24 21:23:44,981 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:23:44,981 INFO ]: With dead ends: 17 [2018-06-24 21:23:44,981 INFO ]: Without dead ends: 0 [2018-06-24 21:23:44,981 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2018-06-24 21:23:44,981 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-24 21:23:44,981 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-24 21:23:44,981 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-24 21:23:44,981 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-24 21:23:44,981 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2018-06-24 21:23:44,981 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:23:44,981 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-24 21:23:44,981 INFO ]: Interpolant automaton has 13 states. [2018-06-24 21:23:44,981 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-24 21:23:44,981 INFO ]: Finished isEmpty. No accepting run. [2018-06-24 21:23:44,983 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 21:23:44,984 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:23:44 BasicIcfg [2018-06-24 21:23:44,985 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 21:23:44,985 INFO ]: Toolchain (without parser) took 3645.18 ms. Allocated memory was 302.5 MB in the beginning and 323.5 MB in the end (delta: 21.0 MB). Free memory was 258.9 MB in the beginning and 204.8 MB in the end (delta: 54.1 MB). Peak memory consumption was 75.1 MB. Max. memory is 3.6 GB. [2018-06-24 21:23:44,986 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 302.5 MB. Free memory is still 268.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:23:44,987 INFO ]: ChcToBoogie took 58.69 ms. Allocated memory is still 302.5 MB. Free memory was 258.9 MB in the beginning and 256.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:23:44,987 INFO ]: Boogie Preprocessor took 32.51 ms. Allocated memory is still 302.5 MB. Free memory was 256.9 MB in the beginning and 255.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-24 21:23:44,988 INFO ]: RCFGBuilder took 247.15 ms. Allocated memory is still 302.5 MB. Free memory was 255.9 MB in the beginning and 247.9 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:23:44,988 INFO ]: BlockEncodingV2 took 218.75 ms. Allocated memory is still 302.5 MB. Free memory was 247.9 MB in the beginning and 243.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:23:44,989 INFO ]: TraceAbstraction took 3079.45 ms. Allocated memory was 302.5 MB in the beginning and 323.5 MB in the end (delta: 21.0 MB). Free memory was 243.9 MB in the beginning and 204.8 MB in the end (delta: 39.1 MB). Peak memory consumption was 60.1 MB. Max. memory is 3.6 GB. [2018-06-24 21:23:44,993 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 15 locations, 18 edges - StatisticsResult: Encoded RCFG 7 locations, 9 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 302.5 MB. Free memory is still 268.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.69 ms. Allocated memory is still 302.5 MB. Free memory was 258.9 MB in the beginning and 256.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 32.51 ms. Allocated memory is still 302.5 MB. Free memory was 256.9 MB in the beginning and 255.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 247.15 ms. Allocated memory is still 302.5 MB. Free memory was 255.9 MB in the beginning and 247.9 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 218.75 ms. Allocated memory is still 302.5 MB. Free memory was 247.9 MB in the beginning and 243.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3079.45 ms. Allocated memory was 302.5 MB in the beginning and 323.5 MB in the end (delta: 21.0 MB). Free memory was 243.9 MB in the beginning and 204.8 MB in the end (delta: 39.1 MB). Peak memory consumption was 60.1 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, 7 locations, 1 error locations. SAFE Result, 3.0s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 1.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 26 SDtfs, 8 SDslu, 26 SDs, 0 SdLazy, 201 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 62 ConstructedInterpolants, 0 QuantifiedInterpolants, 4657 SizeOfPredicates, 41 NumberOfNonLiveVariables, 222 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 33/54 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/repeat4.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_21-23-45-005.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/repeat4.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_21-23-45-005.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/repeat4.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_21-23-45-005.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/repeat4.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_21-23-45-005.csv Received shutdown request...