java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.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/nested1.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:34:13,907 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:34:13,931 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:34:13,942 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:34:13,942 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:34:13,943 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:34:13,944 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:34:13,947 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:34:13,948 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:34:13,949 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:34:13,950 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:34:13,950 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:34:13,951 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:34:13,952 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:34:13,953 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:34:13,954 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:34:13,956 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:34:13,957 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:34:13,959 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:34:13,960 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:34:13,961 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:34:13,968 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:34:13,969 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:34:13,969 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:34:13,970 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:34:13,971 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:34:13,971 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:34:13,972 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:34:13,973 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:34:13,974 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:34:13,975 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:34:13,975 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:34:13,976 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:34:13,977 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:34:13,977 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:34:13,978 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:34:13,999 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:34:13,999 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:34:14,004 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:34:14,005 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:34:14,006 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:34:14,010 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:34:14,010 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:34:14,010 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:34:14,011 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:34:14,011 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:34:14,011 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:34:14,011 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:34:14,011 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:34:14,011 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:34:14,012 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:34:14,012 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:34:14,012 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:34:14,013 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:34:14,014 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:34:14,066 INFO ]: Repository-Root is: /tmp [2018-06-22 05:34:14,106 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:34:14,110 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:34:14,112 INFO ]: Initializing SmtParser... [2018-06-22 05:34:14,112 INFO ]: SmtParser initialized [2018-06-22 05:34:14,113 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested1.c.smt2 [2018-06-22 05:34:14,133 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 [2018-06-22 05:34:14,429 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested1.c.smt2 unknown [2018-06-22 05:34:14,693 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested1.c.smt2 [2018-06-22 05:34:14,730 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:34:14,736 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:34:14,736 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:34:14,736 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:34:14,737 INFO ]: ChcToBoogie initialized [2018-06-22 05:34:14,762 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:34:14" (1/1) ... [2018-06-22 05:34:15,031 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:34:15 Unit [2018-06-22 05:34:15,031 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:34:15,032 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:34:15,032 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:34:15,032 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:34:15,046 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:34:15" (1/1) ... [2018-06-22 05:34:15,047 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:34:15" (1/1) ... [2018-06-22 05:34:15,052 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:34:15" (1/1) ... [2018-06-22 05:34:15,053 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:34:15" (1/1) ... [2018-06-22 05:34:15,056 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:34:15" (1/1) ... [2018-06-22 05:34:15,059 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:34:15" (1/1) ... [2018-06-22 05:34:15,060 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:34:15" (1/1) ... [2018-06-22 05:34:15,062 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:34:15,063 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:34:15,063 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:34:15,063 INFO ]: RCFGBuilder initialized [2018-06-22 05:34:15,064 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:34:15" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:34:15,111 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:34:15,111 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:34:15,111 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:34:15,111 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:34:15,111 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:34:15,111 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:34:15,316 INFO ]: Using library mode [2018-06-22 05:34:15,317 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:34:15 BoogieIcfgContainer [2018-06-22 05:34:15,317 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:34:15,319 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:34:15,319 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:34:15,328 INFO ]: TraceAbstraction initialized [2018-06-22 05:34:15,328 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:34:14" (1/3) ... [2018-06-22 05:34:15,329 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9af05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:34:15, skipping insertion in model container [2018-06-22 05:34:15,329 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:34:15" (2/3) ... [2018-06-22 05:34:15,330 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9af05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:34:15, skipping insertion in model container [2018-06-22 05:34:15,330 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:34:15" (3/3) ... [2018-06-22 05:34:15,332 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:34:15,343 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:34:15,409 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:34:15,592 INFO ]: Using default assertion order modulation [2018-06-22 05:34:15,593 INFO ]: Interprodecural is true [2018-06-22 05:34:15,593 INFO ]: Hoare is false [2018-06-22 05:34:15,593 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:34:15,593 INFO ]: Backedges is TWOTRACK [2018-06-22 05:34:15,593 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:34:15,593 INFO ]: Difference is false [2018-06-22 05:34:15,593 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:34:15,593 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:34:15,630 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:34:15,639 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:34:15,639 INFO ]: Found error trace [2018-06-22 05:34:15,640 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:34:15,640 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:34:15,644 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 05:34:15,646 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:34:15,646 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:34:15,699 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:34:15,699 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:34:15,699 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:34:15,792 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:34:15,888 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:34:15,890 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:34:15,890 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:34:15,899 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:34:15,970 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:34:15,970 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:34:16,016 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:34:16,270 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:34:16,270 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:34:16,271 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:34:16,277 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:34:16,277 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:34:16,288 INFO ]: With dead ends: 9 [2018-06-22 05:34:16,288 INFO ]: Without dead ends: 9 [2018-06-22 05:34:16,302 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 [2018-06-22 05:34:16,361 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:34:16,395 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:34:16,403 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:34:16,404 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:34:16,405 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:34:16,405 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:34:16,405 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:34:16,405 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:34:16,406 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:34:16,406 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:34:16,406 INFO ]: Found error trace [2018-06-22 05:34:16,406 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:34:16,406 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:34:16,406 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 05:34:16,406 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:34:16,406 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:34:16,407 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:34:16,407 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:34:16,407 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:34:16,440 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:34:16,541 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:34:16,541 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:34:16,541 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 [2018-06-22 05:34:16,548 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:34:16,594 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:34:16,606 INFO ]: Computing forward predicates... [2018-06-22 05:34:17,245 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:34:17,281 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:34:17,281 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:34:17,282 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:34:17,282 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:34:17,282 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:34:17,282 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:34:17,370 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:34:17,370 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:34:17,371 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 05:34:17,371 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:34:17,371 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:34:17,371 INFO ]: With dead ends: 10 [2018-06-22 05:34:17,371 INFO ]: Without dead ends: 10 [2018-06-22 05:34:17,372 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:34:17,372 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:34:17,373 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:34:17,373 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:34:17,374 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:34:17,374 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:34:17,374 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:34:17,374 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:34:17,374 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:34:17,374 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:34:17,374 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:34:17,374 INFO ]: Found error trace [2018-06-22 05:34:17,374 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:34:17,375 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:34:17,376 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 05:34:17,376 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:34:17,376 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:34:17,377 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:34:17,377 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:34:17,377 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:34:17,465 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:34:17,709 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:34:17,709 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:34:17,709 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 [2018-06-22 05:34:17,716 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:34:17,787 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:34:17,787 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:34:17,790 INFO ]: Computing forward predicates... [2018-06-22 05:34:19,309 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:34:19,330 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:34:19,330 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:34:19,330 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:34:19,331 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:34:19,331 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:34:19,331 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:34:19,811 WARN ]: Spent 432.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 9 [2018-06-22 05:34:19,845 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:34:19,845 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:34:19,845 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:34:19,845 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:34:19,845 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:34:19,845 INFO ]: With dead ends: 11 [2018-06-22 05:34:19,845 INFO ]: Without dead ends: 11 [2018-06-22 05:34:19,846 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:34:19,846 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:34:19,847 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:34:19,847 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:34:19,847 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:34:19,847 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:34:19,847 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:34:19,847 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:34:19,847 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:34:19,847 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:34:19,847 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:34:19,847 INFO ]: Found error trace [2018-06-22 05:34:19,847 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:34:19,847 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:34:19,848 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 3 times [2018-06-22 05:34:19,848 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:34:19,848 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:34:19,850 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:34:19,851 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:34:19,851 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:34:19,893 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:34:19,998 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:34:19,998 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:34:19,999 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 [2018-06-22 05:34:20,007 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:34:20,062 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:34:20,062 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:34:20,065 INFO ]: Computing forward predicates... [2018-06-22 05:34:22,066 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:34:22,100 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:34:22,100 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 05:34:22,101 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:34:22,101 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:34:22,101 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:34:22,101 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2018-06-22 05:34:22,280 WARN ]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 05:34:22,669 WARN ]: Spent 305.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 6 [2018-06-22 05:34:23,329 WARN ]: Spent 564.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-22 05:34:23,988 WARN ]: Spent 545.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 9 [2018-06-22 05:34:24,130 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:34:24,130 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:34:24,130 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:34:24,130 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-22 05:34:24,130 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:34:24,130 INFO ]: With dead ends: 13 [2018-06-22 05:34:24,130 INFO ]: Without dead ends: 13 [2018-06-22 05:34:24,131 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:34:24,131 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:34:24,132 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:34:24,132 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:34:24,133 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:34:24,133 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 05:34:24,133 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:34:24,133 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:34:24,133 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:34:24,133 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:34:24,133 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:34:24,133 INFO ]: Found error trace [2018-06-22 05:34:24,133 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:34:24,133 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:34:24,134 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 4 times [2018-06-22 05:34:24,134 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:34:24,134 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:34:24,134 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:34:24,134 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:34:24,134 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:34:24,199 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:34:24,451 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:34:24,451 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:34:24,451 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:34:24,458 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:34:24,511 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:34:24,511 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:34:24,514 INFO ]: Computing forward predicates... [2018-06-22 05:34:26,371 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:35:11,360 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:35:11,487 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:35:11,487 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-22 05:35:11,488 INFO ]: Interpolant automaton has 10 states [2018-06-22 05:35:11,488 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 05:35:11,488 INFO ]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:35:11,488 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-06-22 05:35:11,711 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:35:11,711 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:35:11,711 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:35:11,711 INFO ]: Start accepts. Automaton has 10 states. Word has length 12 [2018-06-22 05:35:11,712 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:35:11,712 INFO ]: With dead ends: 14 [2018-06-22 05:35:11,712 INFO ]: Without dead ends: 14 [2018-06-22 05:35:11,712 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2018-06-22 05:35:11,712 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:35:11,714 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:35:11,714 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:35:11,714 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:35:11,714 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:35:11,714 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:35:11,714 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:35:11,714 INFO ]: Interpolant automaton has 10 states. [2018-06-22 05:35:11,715 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:35:11,715 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:35:11,715 INFO ]: Found error trace [2018-06-22 05:35:11,715 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:35:11,715 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:35:11,715 INFO ]: Analyzing trace with hash 679342766, now seen corresponding path program 5 times [2018-06-22 05:35:11,715 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:35:11,715 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:35:11,716 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:35:11,716 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:35:11,716 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:35:11,794 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:35:12,176 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:35:12,176 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:35:12,176 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:35:12,184 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:35:12,239 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:35:12,239 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:35:12,243 INFO ]: Computing forward predicates... [2018-06-22 05:35:12,829 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 18 Received shutdown request... [2018-06-22 05:35:17,295 INFO ]: Timeout while computing interpolants [2018-06-22 05:35:17,495 WARN ]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:35:17,495 WARN ]: Verification canceled [2018-06-22 05:35:17,519 WARN ]: Timeout [2018-06-22 05:35:17,519 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:35:17 BoogieIcfgContainer [2018-06-22 05:35:17,519 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:35:17,533 INFO ]: Toolchain (without parser) took 62802.51 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 259.0 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 113.4 MB. Max. memory is 3.6 GB. [2018-06-22 05:35:17,534 INFO ]: SmtParser took 0.14 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:35:17,534 INFO ]: ChcToBoogie took 294.74 ms. Allocated memory is still 304.6 MB. Free memory was 258.0 MB in the beginning and 256.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:35:17,535 INFO ]: Boogie Preprocessor took 30.70 ms. Allocated memory is still 304.6 MB. Free memory was 256.0 MB in the beginning and 255.0 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 05:35:17,535 INFO ]: RCFGBuilder took 253.78 ms. Allocated memory is still 304.6 MB. Free memory was 255.0 MB in the beginning and 246.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:35:17,538 INFO ]: TraceAbstraction took 62199.98 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 246.0 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 100.3 MB. Max. memory is 3.6 GB. [2018-06-22 05:35:17,551 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.14 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 294.74 ms. Allocated memory is still 304.6 MB. Free memory was 258.0 MB in the beginning and 256.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 30.70 ms. Allocated memory is still 304.6 MB. Free memory was 256.0 MB in the beginning and 255.0 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 253.78 ms. Allocated memory is still 304.6 MB. Free memory was 255.0 MB in the beginning and 246.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 62199.98 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 246.0 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 100.3 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 (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 14 with TraceHistMax 6, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 11 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 61.9s OverallTime, 6 OverallIterations, 6 TraceHistogramMax, 3.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 35 SDtfs, 7 SDslu, 92 SDs, 0 SdLazy, 38 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=5, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 51.8s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 2136 SizeOfPredicates, 16 NumberOfNonLiveVariables, 513 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 0/50 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/nested1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-35-17-563.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-35-17-563.csv Completed graceful shutdown