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/eldarica-misc/LIA/llreve/loop_safe.c-1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 17:52:26,860 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 17:52:26,862 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 17:52:26,875 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 17:52:26,875 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 17:52:26,877 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 17:52:26,878 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 17:52:26,885 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 17:52:26,886 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 17:52:26,887 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 17:52:26,889 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 17:52:26,889 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 17:52:26,890 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 17:52:26,891 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 17:52:26,892 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 17:52:26,892 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 17:52:26,895 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 17:52:26,897 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 17:52:26,906 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 17:52:26,908 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 17:52:26,909 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 17:52:26,910 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 17:52:26,915 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 17:52:26,915 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 17:52:26,915 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 17:52:26,916 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 17:52:26,917 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 17:52:26,917 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 17:52:26,921 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 17:52:26,922 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 17:52:26,922 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 17:52:26,923 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 17:52:26,923 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 17:52:26,923 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 17:52:26,925 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 17:52:26,926 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 17:52:26,926 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 17:52:26,947 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 17:52:26,948 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 17:52:26,948 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 17:52:26,948 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 17:52:26,951 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 17:52:26,952 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 17:52:26,952 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 17:52:26,952 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 17:52:26,952 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 17:52:26,953 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 17:52:26,953 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 17:52:26,953 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 17:52:26,953 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 17:52:26,953 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 17:52:26,954 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 17:52:26,954 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 17:52:26,954 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 17:52:26,954 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 17:52:26,954 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 17:52:26,954 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 17:52:26,955 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 17:52:26,957 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 17:52:26,957 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 17:52:27,003 INFO ]: Repository-Root is: /tmp [2018-06-26 17:52:27,020 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 17:52:27,024 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 17:52:27,026 INFO ]: Initializing SmtParser... [2018-06-26 17:52:27,026 INFO ]: SmtParser initialized [2018-06-26 17:52:27,027 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/llreve/loop_safe.c-1.smt2 [2018-06-26 17:52:27,028 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 [2018-06-26 17:52:27,111 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/loop_safe.c-1.smt2 unknown [2018-06-26 17:52:27,277 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/loop_safe.c-1.smt2 [2018-06-26 17:52:27,283 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 17:52:27,290 INFO ]: Walking toolchain with 5 elements. [2018-06-26 17:52:27,290 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 17:52:27,291 INFO ]: Initializing ChcToBoogie... [2018-06-26 17:52:27,291 INFO ]: ChcToBoogie initialized [2018-06-26 17:52:27,295 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 05:52:27" (1/1) ... [2018-06-26 17:52:27,350 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 05:52:27 Unit [2018-06-26 17:52:27,350 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 17:52:27,351 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 17:52:27,351 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 17:52:27,351 INFO ]: Boogie Preprocessor initialized [2018-06-26 17:52:27,373 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 05:52:27" (1/1) ... [2018-06-26 17:52:27,373 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 05:52:27" (1/1) ... [2018-06-26 17:52:27,379 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 05:52:27" (1/1) ... [2018-06-26 17:52:27,379 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 05:52:27" (1/1) ... [2018-06-26 17:52:27,383 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 05:52:27" (1/1) ... [2018-06-26 17:52:27,384 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 05:52:27" (1/1) ... [2018-06-26 17:52:27,385 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 05:52:27" (1/1) ... [2018-06-26 17:52:27,387 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 17:52:27,387 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 17:52:27,387 INFO ]: Initializing RCFGBuilder... [2018-06-26 17:52:27,387 INFO ]: RCFGBuilder initialized [2018-06-26 17:52:27,389 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 05:52:27" (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) [2018-06-26 17:52:27,402 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 17:52:27,402 INFO ]: Found specification of procedure gotoProc [2018-06-26 17:52:27,402 INFO ]: Found implementation of procedure gotoProc [2018-06-26 17:52:27,402 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 17:52:27,402 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 17:52:27,402 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 [2018-06-26 17:52:27,646 INFO ]: Using library mode [2018-06-26 17:52:27,646 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 05:52:27 BoogieIcfgContainer [2018-06-26 17:52:27,646 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 17:52:27,647 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 17:52:27,647 INFO ]: Initializing BlockEncodingV2... [2018-06-26 17:52:27,654 INFO ]: BlockEncodingV2 initialized [2018-06-26 17:52:27,654 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 05:52:27" (1/1) ... [2018-06-26 17:52:27,669 INFO ]: Initial Icfg 13 locations, 14 edges [2018-06-26 17:52:27,670 INFO ]: Using Remove infeasible edges [2018-06-26 17:52:27,671 INFO ]: Using Maximize final states [2018-06-26 17:52:27,671 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 17:52:27,671 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 17:52:27,673 INFO ]: Using Remove sink states [2018-06-26 17:52:27,674 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 17:52:27,674 INFO ]: Using Use SBE [2018-06-26 17:52:27,695 INFO ]: SBE split 2 edges [2018-06-26 17:52:27,701 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-26 17:52:27,703 INFO ]: 0 new accepting states [2018-06-26 17:52:27,781 INFO ]: Removed 9 edges and 4 locations by large block encoding [2018-06-26 17:52:27,783 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 17:52:27,784 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 17:52:27,784 INFO ]: 0 new accepting states [2018-06-26 17:52:27,784 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 17:52:27,785 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 17:52:27,785 INFO ]: Encoded RCFG 7 locations, 10 edges [2018-06-26 17:52:27,785 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 05:52:27 BasicIcfg [2018-06-26 17:52:27,785 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 17:52:27,788 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 17:52:27,788 INFO ]: Initializing TraceAbstraction... [2018-06-26 17:52:27,792 INFO ]: TraceAbstraction initialized [2018-06-26 17:52:27,792 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 05:52:27" (1/4) ... [2018-06-26 17:52:27,793 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba576b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 05:52:27, skipping insertion in model container [2018-06-26 17:52:27,793 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 05:52:27" (2/4) ... [2018-06-26 17:52:27,794 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba576b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 05:52:27, skipping insertion in model container [2018-06-26 17:52:27,794 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 05:52:27" (3/4) ... [2018-06-26 17:52:27,794 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ba576b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 05:52:27, skipping insertion in model container [2018-06-26 17:52:27,794 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 05:52:27" (4/4) ... [2018-06-26 17:52:27,798 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 17:52:27,807 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 17:52:27,816 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 17:52:27,859 INFO ]: Using default assertion order modulation [2018-06-26 17:52:27,860 INFO ]: Interprodecural is true [2018-06-26 17:52:27,860 INFO ]: Hoare is false [2018-06-26 17:52:27,860 INFO ]: Compute interpolants for FPandBP [2018-06-26 17:52:27,860 INFO ]: Backedges is TWOTRACK [2018-06-26 17:52:27,860 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 17:52:27,860 INFO ]: Difference is false [2018-06-26 17:52:27,860 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 17:52:27,860 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 17:52:27,869 INFO ]: Start isEmpty. Operand 7 states. [2018-06-26 17:52:27,878 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 17:52:27,878 INFO ]: Found error trace [2018-06-26 17:52:27,879 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 17:52:27,879 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 17:52:27,884 INFO ]: Analyzing trace with hash 991436244, now seen corresponding path program 1 times [2018-06-26 17:52:27,885 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 17:52:27,885 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 17:52:27,922 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 17:52:27,922 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 17:52:27,922 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 17:52:27,960 INFO ]: Conjunction of SSA is unsat [2018-06-26 17:52:28,040 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 17:52:28,042 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 17:52:28,042 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-26 17:52:28,043 INFO ]: Interpolant automaton has 4 states [2018-06-26 17:52:28,055 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-26 17:52:28,055 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-26 17:52:28,057 INFO ]: Start difference. First operand 7 states. Second operand 4 states. [2018-06-26 17:52:28,205 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 17:52:28,205 INFO ]: Finished difference Result 11 states and 17 transitions. [2018-06-26 17:52:28,206 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 17:52:28,207 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-26 17:52:28,207 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 17:52:28,216 INFO ]: With dead ends: 11 [2018-06-26 17:52:28,216 INFO ]: Without dead ends: 11 [2018-06-26 17:52:28,218 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-26 17:52:28,233 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-26 17:52:28,248 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-06-26 17:52:28,249 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 17:52:28,249 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2018-06-26 17:52:28,250 INFO ]: Start accepts. Automaton has 9 states and 14 transitions. Word has length 6 [2018-06-26 17:52:28,250 INFO ]: Finished accepts. word is rejected. [2018-06-26 17:52:28,250 INFO ]: Abstraction has 9 states and 14 transitions. [2018-06-26 17:52:28,250 INFO ]: Interpolant automaton has 4 states. [2018-06-26 17:52:28,250 INFO ]: Start isEmpty. Operand 9 states and 14 transitions. [2018-06-26 17:52:28,251 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 17:52:28,251 INFO ]: Found error trace [2018-06-26 17:52:28,251 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-26 17:52:28,251 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 17:52:28,251 INFO ]: Analyzing trace with hash 669135633, now seen corresponding path program 1 times [2018-06-26 17:52:28,251 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 17:52:28,251 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 17:52:28,252 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 17:52:28,252 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 17:52:28,252 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 17:52:28,269 INFO ]: Conjunction of SSA is unsat [2018-06-26 17:52:28,359 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 17:52:28,359 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 17:52:28,359 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 [2018-06-26 17:52:28,366 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 17:52:28,388 INFO ]: Conjunction of SSA is unsat [2018-06-26 17:52:28,394 INFO ]: Computing forward predicates... [2018-06-26 17:52:28,429 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 17:52:28,449 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-26 17:52:28,449 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2018-06-26 17:52:28,450 INFO ]: Interpolant automaton has 6 states [2018-06-26 17:52:28,450 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-26 17:52:28,450 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-26 17:52:28,450 INFO ]: Start difference. First operand 9 states and 14 transitions. Second operand 6 states. [2018-06-26 17:52:28,830 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 17:52:28,830 INFO ]: Finished difference Result 12 states and 19 transitions. [2018-06-26 17:52:28,830 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-26 17:52:28,830 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-26 17:52:28,831 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 17:52:28,832 INFO ]: With dead ends: 12 [2018-06-26 17:52:28,832 INFO ]: Without dead ends: 10 [2018-06-26 17:52:28,832 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-26 17:52:28,832 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-26 17:52:28,834 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-26 17:52:28,834 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-26 17:52:28,835 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2018-06-26 17:52:28,835 INFO ]: Start accepts. Automaton has 10 states and 15 transitions. Word has length 7 [2018-06-26 17:52:28,835 INFO ]: Finished accepts. word is rejected. [2018-06-26 17:52:28,835 INFO ]: Abstraction has 10 states and 15 transitions. [2018-06-26 17:52:28,835 INFO ]: Interpolant automaton has 6 states. [2018-06-26 17:52:28,835 INFO ]: Start isEmpty. Operand 10 states and 15 transitions. [2018-06-26 17:52:28,835 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 17:52:28,835 INFO ]: Found error trace [2018-06-26 17:52:28,835 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-26 17:52:28,835 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 17:52:28,836 INFO ]: Analyzing trace with hash 661270809, now seen corresponding path program 1 times [2018-06-26 17:52:28,836 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 17:52:28,836 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 17:52:28,837 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 17:52:28,837 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 17:52:28,837 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 17:52:28,849 INFO ]: Conjunction of SSA is unsat [2018-06-26 17:52:28,910 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 17:52:28,910 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 17:52:28,910 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-26 17:52:28,910 INFO ]: Interpolant automaton has 4 states [2018-06-26 17:52:28,910 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-26 17:52:28,910 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-26 17:52:28,911 INFO ]: Start difference. First operand 10 states and 15 transitions. Second operand 4 states. [2018-06-26 17:52:28,973 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 17:52:28,973 INFO ]: Finished difference Result 13 states and 19 transitions. [2018-06-26 17:52:28,973 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 17:52:28,973 INFO ]: Start accepts. Automaton has 4 states. Word has length 7 [2018-06-26 17:52:28,973 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 17:52:28,974 INFO ]: With dead ends: 13 [2018-06-26 17:52:28,974 INFO ]: Without dead ends: 13 [2018-06-26 17:52:28,974 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-26 17:52:28,974 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-26 17:52:28,976 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 10. [2018-06-26 17:52:28,976 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-26 17:52:28,976 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2018-06-26 17:52:28,976 INFO ]: Start accepts. Automaton has 10 states and 15 transitions. Word has length 7 [2018-06-26 17:52:28,976 INFO ]: Finished accepts. word is rejected. [2018-06-26 17:52:28,976 INFO ]: Abstraction has 10 states and 15 transitions. [2018-06-26 17:52:28,976 INFO ]: Interpolant automaton has 4 states. [2018-06-26 17:52:28,976 INFO ]: Start isEmpty. Operand 10 states and 15 transitions. [2018-06-26 17:52:28,977 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 17:52:28,977 INFO ]: Found error trace [2018-06-26 17:52:28,977 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-26 17:52:28,977 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 17:52:28,977 INFO ]: Analyzing trace with hash 661300600, now seen corresponding path program 1 times [2018-06-26 17:52:28,977 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 17:52:28,977 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 17:52:28,978 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 17:52:28,978 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 17:52:28,978 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 17:52:28,989 INFO ]: Conjunction of SSA is sat [2018-06-26 17:52:28,990 INFO ]: Counterexample might be feasible [2018-06-26 17:52:29,002 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 17:52:29,003 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 05:52:29 BasicIcfg [2018-06-26 17:52:29,003 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 17:52:29,004 INFO ]: Toolchain (without parser) took 1720.74 ms. Allocated memory is still 303.0 MB. Free memory was 259.4 MB in the beginning and 199.7 MB in the end (delta: 59.6 MB). Peak memory consumption was 59.6 MB. Max. memory is 3.6 GB. [2018-06-26 17:52:29,006 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 303.0 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 17:52:29,006 INFO ]: ChcToBoogie took 60.06 ms. Allocated memory is still 303.0 MB. Free memory was 259.4 MB in the beginning and 256.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-26 17:52:29,006 INFO ]: Boogie Preprocessor took 35.70 ms. Allocated memory is still 303.0 MB. Free memory was 256.4 MB in the beginning and 255.4 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. [2018-06-26 17:52:29,007 INFO ]: RCFGBuilder took 259.04 ms. Allocated memory is still 303.0 MB. Free memory was 255.4 MB in the beginning and 247.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-26 17:52:29,008 INFO ]: BlockEncodingV2 took 138.70 ms. Allocated memory is still 303.0 MB. Free memory was 247.4 MB in the beginning and 243.4 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-26 17:52:29,008 INFO ]: TraceAbstraction took 1215.39 ms. Allocated memory is still 303.0 MB. Free memory was 243.4 MB in the beginning and 199.7 MB in the end (delta: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 3.6 GB. [2018-06-26 17:52:29,012 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 13 locations, 14 edges - StatisticsResult: Encoded RCFG 7 locations, 10 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 303.0 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 60.06 ms. Allocated memory is still 303.0 MB. Free memory was 259.4 MB in the beginning and 256.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 35.70 ms. Allocated memory is still 303.0 MB. Free memory was 256.4 MB in the beginning and 255.4 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. * RCFGBuilder took 259.04 ms. Allocated memory is still 303.0 MB. Free memory was 255.4 MB in the beginning and 247.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 138.70 ms. Allocated memory is still 303.0 MB. Free memory was 247.4 MB in the beginning and 243.4 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 1215.39 ms. Allocated memory is still 303.0 MB. Free memory was 243.4 MB in the beginning and 199.7 MB in the end (delta: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [UNKNOWN] : assertion can be violated assertion can be violated We found a FailurePath: [L0] CALL call gotoProc(0, 0, 0, 0, 0, 0); [L0] assume !(!(hbv_inv_main25_1_Int == 0) && 0 <= hbv_inv_main25_2_Int); [L0] hhv_inv_main19_0_Int, hhv_inv_main19_1_Int, hhv_inv_main19_2_Int, hhv_inv_main19_3_Int, hhv_inv_main19_4_Int := hhv_inv_main25_0_Int, hhv_inv_main25_1_Int, hbv_inv_main25_3_Int, hbv_inv_main25_2_Int, hhv_inv_main25_2_Int; [L0] havoc hbv_inv_main25_1_Int, hbv_inv_main25_2_Int, hbv_inv_main25_3_Int; [L0] assume ((!(hbv_inv_main19_1_Int == 0) && hhv_inv_main19_3_Int == hbv_inv_main19_2_Int + -1) && 0 <= hbv_inv_main19_2_Int) && hhv_inv_main19_4_Int == hbv_inv_main19_3_Int + 1; [L0] hhv_inv_main19_0_Int, hhv_inv_main19_1_Int, hhv_inv_main19_2_Int, hhv_inv_main19_3_Int, hhv_inv_main19_4_Int := hhv_inv_main19_0_Int, hhv_inv_main19_1_Int, hhv_inv_main19_2_Int, hbv_inv_main19_2_Int, hbv_inv_main19_3_Int; [L0] havoc hbv_inv_main19_3_Int, hbv_inv_main19_2_Int, hbv_inv_main19_1_Int; [L0] assume ((hhv_inv_main19_2_Int == hhv_inv_main19_0_Int && !(0 <= hbv_inv_main19_1_Int + -1 * hbv_inv_main19_2_Int && !(hbv_inv_main19_3_Int == 0))) && hhv_inv_main19_4_Int == 0) && hhv_inv_main19_3_Int == hhv_inv_main19_0_Int; [L0] hhv_inv_main8_0_Int, hhv_inv_main8_1_Int, hhv_inv_main8_2_Int, hhv_inv_main8_3_Int := hhv_inv_main19_0_Int, hbv_inv_main19_1_Int, hbv_inv_main19_2_Int, hhv_inv_main19_1_Int; [L0] havoc hbv_inv_main19_3_Int, hbv_inv_main19_2_Int, hbv_inv_main19_1_Int; [L0] RET call gotoProc(0, 0, 0, 0, 0, 0); [L0] assert false; - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 7 locations, 1 error locations. UNSAFE Result, 1.1s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 20 SDtfs, 10 SDslu, 41 SDs, 0 SdLazy, 53 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 415 SizeOfPredicates, 5 NumberOfNonLiveVariables, 75 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop_safe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_17-52-29-035.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop_safe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_17-52-29-035.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop_safe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_17-52-29-035.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop_safe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_17-52-29-035.csv Received shutdown request...