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/nested7.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 01:11:25,724 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 01:11:25,726 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 01:11:25,742 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 01:11:25,743 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 01:11:25,744 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 01:11:25,747 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 01:11:25,750 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 01:11:25,752 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 01:11:25,753 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 01:11:25,754 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 01:11:25,754 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 01:11:25,766 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 01:11:25,767 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 01:11:25,768 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 01:11:25,768 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 01:11:25,770 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 01:11:25,772 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 01:11:25,773 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 01:11:25,778 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 01:11:25,779 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 01:11:25,784 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-06-25 01:11:25,792 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 01:11:25,799 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 01:11:25,800 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 01:11:25,800 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 01:11:25,801 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 01:11:25,802 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 01:11:25,802 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 01:11:25,825 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 01:11:25,825 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 01:11:25,826 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 01:11:25,826 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 01:11:25,827 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 01:11:25,827 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 01:11:25,827 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 01:11:25,831 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 01:11:25,831 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 01:11:25,831 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 01:11:25,832 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 01:11:25,832 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 01:11:25,832 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 01:11:25,832 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 01:11:25,832 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 01:11:25,833 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 01:11:25,833 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 01:11:25,833 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 01:11:25,833 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 01:11:25,833 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 01:11:25,833 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 01:11:25,836 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 01:11:25,836 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 01:11:25,886 INFO ]: Repository-Root is: /tmp [2018-06-25 01:11:25,904 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 01:11:25,912 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 01:11:25,913 INFO ]: Initializing SmtParser... [2018-06-25 01:11:25,913 INFO ]: SmtParser initialized [2018-06-25 01:11:25,914 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested7.c.smt2 [2018-06-25 01:11:25,915 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 [2018-06-25 01:11:26,003 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested7.c.smt2 unknown [2018-06-25 01:11:26,422 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested7.c.smt2 [2018-06-25 01:11:26,428 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 01:11:26,436 INFO ]: Walking toolchain with 5 elements. [2018-06-25 01:11:26,436 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 01:11:26,436 INFO ]: Initializing ChcToBoogie... [2018-06-25 01:11:26,436 INFO ]: ChcToBoogie initialized [2018-06-25 01:11:26,440 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:11:26" (1/1) ... [2018-06-25 01:11:26,495 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:11:26 Unit [2018-06-25 01:11:26,495 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 01:11:26,495 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 01:11:26,495 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 01:11:26,495 INFO ]: Boogie Preprocessor initialized [2018-06-25 01:11:26,516 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:11:26" (1/1) ... [2018-06-25 01:11:26,516 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:11:26" (1/1) ... [2018-06-25 01:11:26,533 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:11:26" (1/1) ... [2018-06-25 01:11:26,534 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:11:26" (1/1) ... [2018-06-25 01:11:26,540 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:11:26" (1/1) ... [2018-06-25 01:11:26,551 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:11:26" (1/1) ... [2018-06-25 01:11:26,553 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:11:26" (1/1) ... [2018-06-25 01:11:26,556 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 01:11:26,557 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 01:11:26,557 INFO ]: Initializing RCFGBuilder... [2018-06-25 01:11:26,557 INFO ]: RCFGBuilder initialized [2018-06-25 01:11:26,557 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:11:26" (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) [2018-06-25 01:11:26,572 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 01:11:26,573 INFO ]: Found specification of procedure gotoProc [2018-06-25 01:11:26,573 INFO ]: Found implementation of procedure gotoProc [2018-06-25 01:11:26,573 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 01:11:26,573 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 01:11:26,573 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 [2018-06-25 01:11:26,907 INFO ]: Using library mode [2018-06-25 01:11:26,908 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:11:26 BoogieIcfgContainer [2018-06-25 01:11:26,908 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 01:11:26,908 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-25 01:11:26,908 INFO ]: Initializing BlockEncodingV2... [2018-06-25 01:11:26,909 INFO ]: BlockEncodingV2 initialized [2018-06-25 01:11:26,910 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:11:26" (1/1) ... [2018-06-25 01:11:26,941 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-25 01:11:26,942 INFO ]: Using Remove infeasible edges [2018-06-25 01:11:26,943 INFO ]: Using Maximize final states [2018-06-25 01:11:26,943 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-25 01:11:26,943 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-25 01:11:26,945 INFO ]: Using Remove sink states [2018-06-25 01:11:26,946 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-25 01:11:26,946 INFO ]: Using Use SBE [2018-06-25 01:11:26,951 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:11:26,974 WARN ]: aborting because of expected exponential blowup for input size 62 [2018-06-25 01:11:26,975 INFO ]: SBE split 0 edges [2018-06-25 01:11:26,985 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-25 01:11:26,988 INFO ]: 0 new accepting states [2018-06-25 01:11:27,038 INFO ]: Removed 4 edges and 2 locations by large block encoding [2018-06-25 01:11:27,040 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:11:27,046 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-25 01:11:27,046 INFO ]: 0 new accepting states [2018-06-25 01:11:27,046 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-25 01:11:27,046 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:11:27,047 INFO ]: Encoded RCFG 6 locations, 6 edges [2018-06-25 01:11:27,047 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:11:27 BasicIcfg [2018-06-25 01:11:27,047 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-25 01:11:27,048 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 01:11:27,048 INFO ]: Initializing TraceAbstraction... [2018-06-25 01:11:27,054 INFO ]: TraceAbstraction initialized [2018-06-25 01:11:27,054 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:11:26" (1/4) ... [2018-06-25 01:11:27,055 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72576be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:11:27, skipping insertion in model container [2018-06-25 01:11:27,055 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:11:26" (2/4) ... [2018-06-25 01:11:27,055 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72576be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:11:27, skipping insertion in model container [2018-06-25 01:11:27,055 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:11:26" (3/4) ... [2018-06-25 01:11:27,056 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72576be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:11:27, skipping insertion in model container [2018-06-25 01:11:27,056 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:11:27" (4/4) ... [2018-06-25 01:11:27,060 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-25 01:11:27,075 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 01:11:27,081 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 01:11:27,126 INFO ]: Using default assertion order modulation [2018-06-25 01:11:27,127 INFO ]: Interprodecural is true [2018-06-25 01:11:27,127 INFO ]: Hoare is false [2018-06-25 01:11:27,127 INFO ]: Compute interpolants for FPandBP [2018-06-25 01:11:27,127 INFO ]: Backedges is TWOTRACK [2018-06-25 01:11:27,127 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 01:11:27,127 INFO ]: Difference is false [2018-06-25 01:11:27,127 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 01:11:27,127 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 01:11:27,136 INFO ]: Start isEmpty. Operand 6 states. [2018-06-25 01:11:27,145 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 01:11:27,145 INFO ]: Found error trace [2018-06-25 01:11:27,145 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 01:11:27,146 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:11:27,152 INFO ]: Analyzing trace with hash 35402562, now seen corresponding path program 1 times [2018-06-25 01:11:27,154 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:11:27,155 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:11:27,186 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:11:27,186 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:11:27,186 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:11:27,236 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:11:27,339 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:11:27,343 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 01:11:27,343 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 01:11:27,345 INFO ]: Interpolant automaton has 3 states [2018-06-25 01:11:27,355 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 01:11:27,356 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:11:27,358 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-25 01:11:27,444 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:11:27,444 INFO ]: Finished difference Result 7 states and 7 transitions. [2018-06-25 01:11:27,448 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 01:11:27,449 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 01:11:27,449 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:11:27,457 INFO ]: With dead ends: 7 [2018-06-25 01:11:27,457 INFO ]: Without dead ends: 7 [2018-06-25 01:11:27,458 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 [2018-06-25 01:11:27,471 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-25 01:11:27,489 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-25 01:11:27,491 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 01:11:27,491 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-06-25 01:11:27,493 INFO ]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-06-25 01:11:27,493 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:11:27,493 INFO ]: Abstraction has 7 states and 7 transitions. [2018-06-25 01:11:27,493 INFO ]: Interpolant automaton has 3 states. [2018-06-25 01:11:27,493 INFO ]: Start isEmpty. Operand 7 states and 7 transitions. [2018-06-25 01:11:27,493 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:11:27,493 INFO ]: Found error trace [2018-06-25 01:11:27,493 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:11:27,493 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:11:27,494 INFO ]: Analyzing trace with hash 1097213384, now seen corresponding path program 1 times [2018-06-25 01:11:27,494 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:11:27,494 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:11:27,495 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:11:27,495 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:11:27,495 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:11:27,623 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:11:27,989 WARN ]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-25 01:11:27,990 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:11:27,990 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:11:27,990 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) [2018-06-25 01:11:28,008 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:11:28,076 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:11:28,084 INFO ]: Computing forward predicates... [2018-06-25 01:11:29,661 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:11:29,697 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:11:29,697 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-25 01:11:29,697 INFO ]: Interpolant automaton has 4 states [2018-06-25 01:11:29,698 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-25 01:11:29,698 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 01:11:29,698 INFO ]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-06-25 01:11:29,799 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:11:29,800 INFO ]: Finished difference Result 8 states and 8 transitions. [2018-06-25 01:11:29,801 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 01:11:29,801 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-25 01:11:29,801 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:11:29,801 INFO ]: With dead ends: 8 [2018-06-25 01:11:29,801 INFO ]: Without dead ends: 8 [2018-06-25 01:11:29,802 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 01:11:29,802 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-25 01:11:29,803 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-06-25 01:11:29,803 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 01:11:29,803 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-06-25 01:11:29,803 INFO ]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-06-25 01:11:29,803 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:11:29,803 INFO ]: Abstraction has 8 states and 8 transitions. [2018-06-25 01:11:29,803 INFO ]: Interpolant automaton has 4 states. [2018-06-25 01:11:29,803 INFO ]: Start isEmpty. Operand 8 states and 8 transitions. [2018-06-25 01:11:29,803 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 01:11:29,804 INFO ]: Found error trace [2018-06-25 01:11:29,804 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 01:11:29,804 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:11:29,804 INFO ]: Analyzing trace with hash -346389502, now seen corresponding path program 2 times [2018-06-25 01:11:29,804 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:11:29,804 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:11:29,805 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:11:29,805 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:11:29,805 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:11:29,882 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:11:30,161 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:11:30,162 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:11:30,162 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 [2018-06-25 01:11:30,168 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 01:11:30,232 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 01:11:30,232 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:11:30,235 INFO ]: Computing forward predicates... [2018-06-25 01:11:31,389 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:11:32,395 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:11:32,414 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:11:32,414 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 01:11:32,414 INFO ]: Interpolant automaton has 6 states [2018-06-25 01:11:32,414 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 01:11:32,414 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:11:32,415 INFO ]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2018-06-25 01:11:32,491 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:11:32,491 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 01:11:32,492 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 01:11:32,492 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-25 01:11:32,492 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:11:32,492 INFO ]: With dead ends: 10 [2018-06-25 01:11:32,492 INFO ]: Without dead ends: 10 [2018-06-25 01:11:32,493 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-25 01:11:32,493 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 01:11:32,494 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 01:11:32,494 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 01:11:32,494 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 01:11:32,494 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-06-25 01:11:32,494 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:11:32,494 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 01:11:32,494 INFO ]: Interpolant automaton has 6 states. [2018-06-25 01:11:32,494 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 01:11:32,494 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 01:11:32,494 INFO ]: Found error trace [2018-06-25 01:11:32,494 INFO ]: trace histogram [4, 1, 1, 1, 1, 1] [2018-06-25 01:11:32,495 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:11:32,495 INFO ]: Analyzing trace with hash 2118624450, now seen corresponding path program 3 times [2018-06-25 01:11:32,495 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:11:32,495 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:11:32,496 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:11:32,496 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:11:32,496 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:11:32,622 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:11:33,198 WARN ]: Spent 303.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-06-25 01:11:33,380 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:11:33,381 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:11:33,381 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:11:33,388 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 01:11:33,477 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 01:11:33,477 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:11:33,481 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 01:12:36,720 INFO ]: Timeout while computing interpolants [2018-06-25 01:12:36,920 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:12:36,921 WARN ]: Verification canceled [2018-06-25 01:12:36,923 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-25 01:12:36,924 WARN ]: Timeout [2018-06-25 01:12:36,924 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:12:36 BasicIcfg [2018-06-25 01:12:36,924 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 01:12:36,925 INFO ]: Toolchain (without parser) took 70495.70 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.4 MB in the beginning and 1.2 GB in the end (delta: -949.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 01:12:36,925 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 302.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 01:12:36,926 INFO ]: ChcToBoogie took 58.78 ms. Allocated memory is still 302.0 MB. Free memory was 247.4 MB in the beginning and 243.3 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 3.6 GB. [2018-06-25 01:12:36,928 INFO ]: Boogie Preprocessor took 60.83 ms. Allocated memory is still 302.0 MB. Free memory was 243.3 MB in the beginning and 241.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:12:36,929 INFO ]: RCFGBuilder took 351.34 ms. Allocated memory is still 302.0 MB. Free memory was 241.3 MB in the beginning and 226.3 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:12:36,929 INFO ]: BlockEncodingV2 took 138.79 ms. Allocated memory is still 302.0 MB. Free memory was 226.3 MB in the beginning and 221.3 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 3.6 GB. [2018-06-25 01:12:36,929 INFO ]: TraceAbstraction took 69875.99 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 221.3 MB in the beginning and 1.2 GB in the end (delta: -975.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 01:12:36,935 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, 6 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 302.0 MB. Free memory is still 267.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.78 ms. Allocated memory is still 302.0 MB. Free memory was 247.4 MB in the beginning and 243.3 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 60.83 ms. Allocated memory is still 302.0 MB. Free memory was 243.3 MB in the beginning and 241.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 351.34 ms. Allocated memory is still 302.0 MB. Free memory was 241.3 MB in the beginning and 226.3 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 138.79 ms. Allocated memory is still 302.0 MB. Free memory was 226.3 MB in the beginning and 221.3 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 69875.99 ms. Allocated memory was 302.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 221.3 MB in the beginning and 1.2 GB in the end (delta: -975.0 MB). Peak memory consumption was 1.3 GB. 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 analyzing trace of length 10 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 25 quantified variables from 21 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 69.8s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 15 SDtfs, 0 SDslu, 15 SDs, 0 SdLazy, 14 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 364 SizeOfPredicates, 12 NumberOfNonLiveVariables, 338 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 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/nested7.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-25_01-12-36-952.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested7.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-25_01-12-36-952.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested7.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-25_01-12-36-952.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested7.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_01-12-36-952.csv Completed graceful shutdown