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/vmt-chc-benchmarks/ctigar/ex1.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 21:27:13,913 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 21:27:13,915 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 21:27:13,929 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 21:27:13,929 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 21:27:13,930 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 21:27:13,931 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 21:27:13,934 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 21:27:13,936 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 21:27:13,936 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 21:27:13,938 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 21:27:13,938 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 21:27:13,939 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 21:27:13,940 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 21:27:13,943 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 21:27:13,943 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 21:27:13,944 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 21:27:13,946 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 21:27:13,955 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 21:27:13,957 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 21:27:13,957 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 21:27:13,958 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 21:27:13,964 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 21:27:13,964 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 21:27:13,964 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 21:27:13,965 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 21:27:13,966 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 21:27:13,966 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 21:27:13,969 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 21:27:13,970 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 21:27:13,970 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 21:27:13,971 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 21:27:13,971 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 21:27:13,971 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 21:27:13,972 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 21:27:13,975 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 21:27:13,975 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 21:27:13,997 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 21:27:13,997 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 21:27:13,997 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 21:27:13,997 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 21:27:14,002 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 21:27:14,003 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 21:27:14,003 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 21:27:14,003 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 21:27:14,003 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 21:27:14,004 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 21:27:14,004 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 21:27:14,004 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 21:27:14,004 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 21:27:14,004 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 21:27:14,004 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 21:27:14,005 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 21:27:14,005 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 21:27:14,005 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 21:27:14,005 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 21:27:14,005 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 21:27:14,005 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 21:27:14,008 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 21:27:14,008 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 21:27:14,053 INFO ]: Repository-Root is: /tmp [2018-06-26 21:27:14,069 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 21:27:14,075 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 21:27:14,076 INFO ]: Initializing SmtParser... [2018-06-26 21:27:14,076 INFO ]: SmtParser initialized [2018-06-26 21:27:14,077 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/ex1.c.smt2 [2018-06-26 21:27:14,079 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 21:27:14,162 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/ex1.c.smt2 unknown [2018-06-26 21:27:14,438 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/ex1.c.smt2 [2018-06-26 21:27:14,444 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 21:27:14,450 INFO ]: Walking toolchain with 5 elements. [2018-06-26 21:27:14,450 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 21:27:14,450 INFO ]: Initializing ChcToBoogie... [2018-06-26 21:27:14,450 INFO ]: ChcToBoogie initialized [2018-06-26 21:27:14,454 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:27:14" (1/1) ... [2018-06-26 21:27:14,513 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:27:14 Unit [2018-06-26 21:27:14,513 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 21:27:14,515 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 21:27:14,515 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 21:27:14,515 INFO ]: Boogie Preprocessor initialized [2018-06-26 21:27:14,539 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:27:14" (1/1) ... [2018-06-26 21:27:14,539 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:27:14" (1/1) ... [2018-06-26 21:27:14,547 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:27:14" (1/1) ... [2018-06-26 21:27:14,547 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:27:14" (1/1) ... [2018-06-26 21:27:14,559 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:27:14" (1/1) ... [2018-06-26 21:27:14,561 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:27:14" (1/1) ... [2018-06-26 21:27:14,562 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:27:14" (1/1) ... [2018-06-26 21:27:14,573 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 21:27:14,574 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 21:27:14,574 INFO ]: Initializing RCFGBuilder... [2018-06-26 21:27:14,574 INFO ]: RCFGBuilder initialized [2018-06-26 21:27:14,575 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:27:14" (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 21:27:14,589 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 21:27:14,589 INFO ]: Found specification of procedure gotoProc [2018-06-26 21:27:14,590 INFO ]: Found implementation of procedure gotoProc [2018-06-26 21:27:14,590 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 21:27:14,590 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 21:27:14,590 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 21:27:14,854 INFO ]: Using library mode [2018-06-26 21:27:14,854 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:27:14 BoogieIcfgContainer [2018-06-26 21:27:14,854 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 21:27:14,855 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 21:27:14,855 INFO ]: Initializing BlockEncodingV2... [2018-06-26 21:27:14,856 INFO ]: BlockEncodingV2 initialized [2018-06-26 21:27:14,856 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:27:14" (1/1) ... [2018-06-26 21:27:14,870 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-26 21:27:14,871 INFO ]: Using Remove infeasible edges [2018-06-26 21:27:14,883 INFO ]: Using Maximize final states [2018-06-26 21:27:14,884 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 21:27:14,884 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 21:27:14,885 INFO ]: Using Remove sink states [2018-06-26 21:27:14,886 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 21:27:14,886 INFO ]: Using Use SBE [2018-06-26 21:27:14,907 WARN ]: expecting exponential blowup for input size 25 [2018-06-26 21:27:56,350 INFO ]: SBE split 1 edges [2018-06-26 21:27:56,393 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-26 21:27:56,394 INFO ]: 0 new accepting states [2018-06-26 21:27:56,450 INFO ]: Removed 4 edges and 2 locations by large block encoding [2018-06-26 21:27:56,452 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:27:56,494 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 21:27:56,494 INFO ]: 0 new accepting states [2018-06-26 21:27:56,495 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 21:27:56,495 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:27:56,555 INFO ]: Encoded RCFG 6 locations, 566 edges [2018-06-26 21:27:56,556 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:27:56 BasicIcfg [2018-06-26 21:27:56,556 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 21:27:56,559 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 21:27:56,559 INFO ]: Initializing TraceAbstraction... [2018-06-26 21:27:56,562 INFO ]: TraceAbstraction initialized [2018-06-26 21:27:56,562 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:27:14" (1/4) ... [2018-06-26 21:27:56,565 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35145751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 09:27:56, skipping insertion in model container [2018-06-26 21:27:56,565 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:27:14" (2/4) ... [2018-06-26 21:27:56,565 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35145751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 09:27:56, skipping insertion in model container [2018-06-26 21:27:56,565 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:27:14" (3/4) ... [2018-06-26 21:27:56,566 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35145751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:27:56, skipping insertion in model container [2018-06-26 21:27:56,566 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:27:56" (4/4) ... [2018-06-26 21:27:56,567 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 21:27:56,577 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 21:27:56,586 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 21:27:56,629 INFO ]: Using default assertion order modulation [2018-06-26 21:27:56,630 INFO ]: Interprodecural is true [2018-06-26 21:27:56,630 INFO ]: Hoare is false [2018-06-26 21:27:56,630 INFO ]: Compute interpolants for FPandBP [2018-06-26 21:27:56,630 INFO ]: Backedges is TWOTRACK [2018-06-26 21:27:56,630 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 21:27:56,630 INFO ]: Difference is false [2018-06-26 21:27:56,630 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 21:27:56,630 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 21:27:56,642 INFO ]: Start isEmpty. Operand 6 states. [2018-06-26 21:27:56,657 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 21:27:56,657 INFO ]: Found error trace [2018-06-26 21:27:56,658 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 21:27:56,658 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:27:56,663 INFO ]: Analyzing trace with hash 52654434, now seen corresponding path program 1 times [2018-06-26 21:27:56,664 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:27:56,665 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:27:56,701 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:27:56,701 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:27:56,701 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:27:56,748 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:27:56,850 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:27:56,852 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:27:56,852 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:27:56,853 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:27:56,864 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:27:56,865 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:27:56,867 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-26 21:27:59,987 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:27:59,987 INFO ]: Finished difference Result 7 states and 694 transitions. [2018-06-26 21:27:59,987 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:27:59,988 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 21:27:59,988 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:28:00,001 INFO ]: With dead ends: 7 [2018-06-26 21:28:00,001 INFO ]: Without dead ends: 7 [2018-06-26 21:28:00,003 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 [2018-06-26 21:28:00,017 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-26 21:28:00,041 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-26 21:28:00,042 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 21:28:00,045 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 694 transitions. [2018-06-26 21:28:00,046 INFO ]: Start accepts. Automaton has 7 states and 694 transitions. Word has length 5 [2018-06-26 21:28:00,047 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:28:00,047 INFO ]: Abstraction has 7 states and 694 transitions. [2018-06-26 21:28:00,047 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:28:00,047 INFO ]: Start isEmpty. Operand 7 states and 694 transitions. [2018-06-26 21:28:00,048 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:28:00,048 INFO ]: Found error trace [2018-06-26 21:28:00,048 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:28:00,048 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:28:00,048 INFO ]: Analyzing trace with hash 1631934926, now seen corresponding path program 1 times [2018-06-26 21:28:00,048 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:28:00,048 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:28:00,049 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:28:00,049 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:28:00,049 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:28:00,059 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:28:00,102 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:28:00,102 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:28:00,102 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:28:00,103 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:28:00,103 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:28:00,103 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:28:00,103 INFO ]: Start difference. First operand 7 states and 694 transitions. Second operand 3 states. [2018-06-26 21:28:01,983 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:28:01,983 INFO ]: Finished difference Result 9 states and 965 transitions. [2018-06-26 21:28:02,014 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:28:02,014 INFO ]: Start accepts. Automaton has 3 states. Word has length 6 [2018-06-26 21:28:02,014 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:28:02,015 INFO ]: With dead ends: 9 [2018-06-26 21:28:02,015 INFO ]: Without dead ends: 9 [2018-06-26 21:28:02,016 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 [2018-06-26 21:28:02,016 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-26 21:28:02,024 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-26 21:28:02,024 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:28:02,026 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 965 transitions. [2018-06-26 21:28:02,026 INFO ]: Start accepts. Automaton has 9 states and 965 transitions. Word has length 6 [2018-06-26 21:28:02,026 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:28:02,026 INFO ]: Abstraction has 9 states and 965 transitions. [2018-06-26 21:28:02,026 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:28:02,026 INFO ]: Start isEmpty. Operand 9 states and 965 transitions. [2018-06-26 21:28:02,027 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:28:02,027 INFO ]: Found error trace [2018-06-26 21:28:02,027 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-26 21:28:02,027 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:28:02,027 INFO ]: Analyzing trace with hash -965736813, now seen corresponding path program 1 times [2018-06-26 21:28:02,027 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:28:02,027 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:28:02,028 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:28:02,028 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:28:02,028 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:28:02,041 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:28:02,063 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-26 21:28:02,064 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:28:02,064 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:28:02,064 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:28:02,064 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:28:02,064 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:28:02,064 INFO ]: Start difference. First operand 9 states and 965 transitions. Second operand 3 states. [2018-06-26 21:28:04,038 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:28:04,038 INFO ]: Finished difference Result 13 states and 1750 transitions. [2018-06-26 21:28:04,039 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:28:04,039 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-26 21:28:04,039 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:28:04,042 INFO ]: With dead ends: 13 [2018-06-26 21:28:04,042 INFO ]: Without dead ends: 13 [2018-06-26 21:28:04,042 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 [2018-06-26 21:28:04,042 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-26 21:28:04,049 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-06-26 21:28:04,049 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-26 21:28:04,053 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1550 transitions. [2018-06-26 21:28:04,053 INFO ]: Start accepts. Automaton has 11 states and 1550 transitions. Word has length 7 [2018-06-26 21:28:04,053 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:28:04,054 INFO ]: Abstraction has 11 states and 1550 transitions. [2018-06-26 21:28:04,054 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:28:04,054 INFO ]: Start isEmpty. Operand 11 states and 1550 transitions. [2018-06-26 21:28:04,055 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:28:04,055 INFO ]: Found error trace [2018-06-26 21:28:04,055 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-26 21:28:04,056 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:28:04,056 INFO ]: Analyzing trace with hash -949470927, now seen corresponding path program 1 times [2018-06-26 21:28:04,056 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:28:04,056 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:28:04,057 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:28:04,057 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:28:04,057 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:28:04,074 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:28:04,100 INFO ]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:28:04,100 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:28:04,100 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:28:04,101 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:28:04,101 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:28:04,101 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:28:04,101 INFO ]: Start difference. First operand 11 states and 1550 transitions. Second operand 3 states. [2018-06-26 21:28:05,543 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:28:05,543 INFO ]: Finished difference Result 13 states and 1253 transitions. [2018-06-26 21:28:05,544 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:28:05,544 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-26 21:28:05,544 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:28:05,546 INFO ]: With dead ends: 13 [2018-06-26 21:28:05,546 INFO ]: Without dead ends: 13 [2018-06-26 21:28:05,547 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 [2018-06-26 21:28:05,547 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-26 21:28:05,555 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-06-26 21:28:05,555 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-26 21:28:05,558 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1109 transitions. [2018-06-26 21:28:05,558 INFO ]: Start accepts. Automaton has 11 states and 1109 transitions. Word has length 7 [2018-06-26 21:28:05,558 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:28:05,558 INFO ]: Abstraction has 11 states and 1109 transitions. [2018-06-26 21:28:05,558 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:28:05,558 INFO ]: Start isEmpty. Operand 11 states and 1109 transitions. [2018-06-26 21:28:05,559 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-26 21:28:05,559 INFO ]: Found error trace [2018-06-26 21:28:05,559 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 21:28:05,559 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:28:05,559 INFO ]: Analyzing trace with hash 112575571, now seen corresponding path program 1 times [2018-06-26 21:28:05,559 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:28:05,559 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:28:05,561 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:28:05,561 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:28:05,561 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:28:05,582 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:28:05,601 INFO ]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-26 21:28:05,601 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:28:05,601 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:28:05,601 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:28:05,601 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:28:05,601 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:28:05,601 INFO ]: Start difference. First operand 11 states and 1109 transitions. Second operand 3 states. Received shutdown request... [2018-06-26 21:28:05,741 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:28:05,742 WARN ]: Verification canceled [2018-06-26 21:28:05,744 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 21:28:05,745 WARN ]: Timeout [2018-06-26 21:28:05,745 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:28:05 BasicIcfg [2018-06-26 21:28:05,745 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 21:28:05,746 INFO ]: Toolchain (without parser) took 51302.09 ms. Allocated memory was 309.3 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 261.7 MB in the beginning and 991.1 MB in the end (delta: -729.4 MB). Peak memory consumption was 1.9 GB. Max. memory is 3.6 GB. [2018-06-26 21:28:05,748 INFO ]: SmtParser took 0.06 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. [2018-06-26 21:28:05,748 INFO ]: ChcToBoogie took 63.33 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:28:05,749 INFO ]: Boogie Preprocessor took 58.25 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:28:05,749 INFO ]: RCFGBuilder took 280.31 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 247.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 3.6 GB. [2018-06-26 21:28:05,750 INFO ]: BlockEncodingV2 took 41701.27 ms. Allocated memory was 309.3 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 247.6 MB in the beginning and 997.4 MB in the end (delta: -749.8 MB). Peak memory consumption was 2.4 GB. Max. memory is 3.6 GB. [2018-06-26 21:28:05,752 INFO ]: TraceAbstraction took 9186.29 ms. Allocated memory was 2.9 GB in the beginning and 2.9 GB in the end (delta: 11.5 MB). Free memory was 985.6 MB in the beginning and 991.1 MB in the end (delta: -5.6 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:28:05,756 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 10 locations, 10 edges - StatisticsResult: Encoded RCFG 6 locations, 566 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 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 63.33 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 58.25 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 280.31 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 247.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 41701.27 ms. Allocated memory was 309.3 MB in the beginning and 2.9 GB in the end (delta: 2.6 GB). Free memory was 247.6 MB in the beginning and 997.4 MB in the end (delta: -749.8 MB). Peak memory consumption was 2.4 GB. Max. memory is 3.6 GB. * TraceAbstraction took 9186.29 ms. Allocated memory was 2.9 GB in the beginning and 2.9 GB in the end (delta: 11.5 MB). Free memory was 985.6 MB in the beginning and 991.1 MB in the end (delta: -5.6 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (11states) and interpolant automaton (currently 3 states, 3 states before enhancement), while ReachableStatesComputation was computing reachable states (3 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 9.1s OverallTime, 5 OverallIterations, 1 TraceHistogramMax, 8.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 1 SDslu, 13 SDs, 0 SdLazy, 3663 SolverSat, 3086 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 175 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 13/13 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ex1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_21-28-05-777.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ex1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_21-28-05-777.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ex1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_21-28-05-777.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ex1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_21-28-05-777.csv Completed graceful shutdown