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/nested.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:38:48,325 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:38:48,327 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:38:48,340 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:38:48,340 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:38:48,341 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:38:48,342 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:38:48,345 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:38:48,346 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:38:48,349 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:38:48,349 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:38:48,350 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:38:48,351 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:38:48,352 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:38:48,356 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:38:48,356 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:38:48,358 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:38:48,372 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:38:48,373 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:38:48,374 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:38:48,375 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:38:48,377 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:38:48,377 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:38:48,377 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:38:48,378 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:38:48,379 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:38:48,380 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:38:48,386 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:38:48,387 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:38:48,388 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:38:48,388 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:38:48,389 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:38:48,389 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:38:48,390 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:38:48,390 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:38:48,391 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:38:48,414 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:38:48,414 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:38:48,414 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:38:48,415 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:38:48,416 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:38:48,417 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:38:48,417 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:38:48,417 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:38:48,417 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:38:48,417 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:38:48,418 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:38:48,418 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:38:48,418 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:38:48,418 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:38:48,418 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:38:48,419 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:38:48,419 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:38:48,421 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:38:48,421 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:38:48,468 INFO ]: Repository-Root is: /tmp [2018-06-22 05:38:48,500 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:38:48,506 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:38:48,507 INFO ]: Initializing SmtParser... [2018-06-22 05:38:48,508 INFO ]: SmtParser initialized [2018-06-22 05:38:48,508 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested.c.smt2 [2018-06-22 05:38:48,510 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 05:38:48,851 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested.c.smt2 unknown [2018-06-22 05:38:49,505 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested.c.smt2 [2018-06-22 05:38:49,510 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:38:49,516 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:38:49,517 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:38:49,517 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:38:49,517 INFO ]: ChcToBoogie initialized [2018-06-22 05:38:49,570 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:38:49" (1/1) ... [2018-06-22 05:38:49,709 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:38:49 Unit [2018-06-22 05:38:49,709 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:38:49,710 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:38:49,710 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:38:49,710 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:38:49,822 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:38:49" (1/1) ... [2018-06-22 05:38:49,823 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:38:49" (1/1) ... [2018-06-22 05:38:49,833 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:38:49" (1/1) ... [2018-06-22 05:38:49,833 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:38:49" (1/1) ... [2018-06-22 05:38:49,852 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:38:49" (1/1) ... [2018-06-22 05:38:49,853 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:38:49" (1/1) ... [2018-06-22 05:38:49,854 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:38:49" (1/1) ... [2018-06-22 05:38:49,856 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:38:49,856 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:38:49,856 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:38:49,856 INFO ]: RCFGBuilder initialized [2018-06-22 05:38:49,857 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:38:49" (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 05:38:50,019 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:38:50,019 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:38:50,019 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:38:50,019 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:38:50,019 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:38:50,019 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:38:50,252 INFO ]: Using library mode [2018-06-22 05:38:50,252 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:38:50 BoogieIcfgContainer [2018-06-22 05:38:50,252 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:38:50,255 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:38:50,255 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:38:50,258 INFO ]: TraceAbstraction initialized [2018-06-22 05:38:50,258 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:38:49" (1/3) ... [2018-06-22 05:38:50,259 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532194f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:38:50, skipping insertion in model container [2018-06-22 05:38:50,259 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:38:49" (2/3) ... [2018-06-22 05:38:50,260 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532194f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:38:50, skipping insertion in model container [2018-06-22 05:38:50,260 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:38:50" (3/3) ... [2018-06-22 05:38:50,262 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:38:50,271 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:38:50,279 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:38:50,341 INFO ]: Using default assertion order modulation [2018-06-22 05:38:50,341 INFO ]: Interprodecural is true [2018-06-22 05:38:50,341 INFO ]: Hoare is false [2018-06-22 05:38:50,341 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:38:50,341 INFO ]: Backedges is TWOTRACK [2018-06-22 05:38:50,341 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:38:50,341 INFO ]: Difference is false [2018-06-22 05:38:50,341 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:38:50,341 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:38:50,386 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:38:50,399 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:38:50,399 INFO ]: Found error trace [2018-06-22 05:38:50,400 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:38:50,400 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:38:50,404 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 05:38:50,406 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:38:50,406 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:38:50,438 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:50,438 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:38:50,438 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:50,499 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:50,564 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:50,610 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:38:50,610 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:38:50,652 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:38:50,744 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:38:50,745 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:38:50,761 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:38:50,902 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:38:50,902 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:38:50,903 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:38:50,904 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:38:50,905 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:38:50,928 INFO ]: With dead ends: 9 [2018-06-22 05:38:50,929 INFO ]: Without dead ends: 9 [2018-06-22 05:38:50,931 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 05:38:51,041 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:38:51,055 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:38:51,061 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:38:51,061 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:38:51,062 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:38:51,062 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:38:51,062 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:38:51,063 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:38:51,063 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:38:51,063 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:38:51,063 INFO ]: Found error trace [2018-06-22 05:38:51,063 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:38:51,063 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:38:51,063 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 05:38:51,063 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:38:51,063 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:38:51,064 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:51,064 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:38:51,064 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:51,096 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:51,238 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:51,238 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:38:51,238 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 05:38:51,255 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:38:51,298 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:51,328 INFO ]: Computing forward predicates... [2018-06-22 05:38:51,536 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:51,556 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:38:51,556 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:38:51,556 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:38:51,557 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:38:51,557 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:38:51,557 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:38:51,623 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:38:51,623 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:38:51,624 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:38:51,624 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:38:51,624 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:38:51,624 INFO ]: With dead ends: 10 [2018-06-22 05:38:51,624 INFO ]: Without dead ends: 10 [2018-06-22 05:38:51,625 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:38:51,625 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:38:51,626 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:38:51,626 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:38:51,626 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:38:51,627 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:38:51,627 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:38:51,627 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:38:51,627 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:38:51,627 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:38:51,627 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:38:51,627 INFO ]: Found error trace [2018-06-22 05:38:51,627 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:38:51,627 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:38:51,627 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 05:38:51,627 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:38:51,627 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:38:51,628 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:51,628 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:38:51,628 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:51,683 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:51,882 WARN ]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 05:38:52,015 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:52,015 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:38:52,015 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 05:38:52,021 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:38:52,072 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:38:52,072 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:52,074 INFO ]: Computing forward predicates... [2018-06-22 05:38:52,948 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:52,968 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:38:52,968 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:38:52,968 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:38:52,968 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:38:52,968 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:38:52,968 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:38:53,019 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:38:53,019 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:38:53,020 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:38:53,020 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:38:53,020 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:38:53,020 INFO ]: With dead ends: 11 [2018-06-22 05:38:53,020 INFO ]: Without dead ends: 11 [2018-06-22 05:38:53,021 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:38:53,021 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:38:53,022 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:38:53,022 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:38:53,022 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:38:53,022 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:38:53,022 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:38:53,022 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:38:53,022 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:38:53,022 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:38:53,022 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:38:53,022 INFO ]: Found error trace [2018-06-22 05:38:53,022 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:38:53,022 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:38:53,022 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 3 times [2018-06-22 05:38:53,023 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:38:53,023 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:38:53,023 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:53,023 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:38:53,023 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:53,069 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:53,470 WARN ]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 05:38:53,555 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:53,555 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:38:53,555 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 05:38:53,565 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:38:53,621 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:38:53,622 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:53,624 INFO ]: Computing forward predicates... [2018-06-22 05:38:55,571 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 9 [2018-06-22 05:38:55,591 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:55,613 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:38:55,614 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 05:38:55,614 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:38:55,614 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:38:55,614 INFO ]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:38:55,615 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2018-06-22 05:38:55,917 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:38:55,917 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:38:55,917 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:38:55,917 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-22 05:38:55,917 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:38:55,917 INFO ]: With dead ends: 12 [2018-06-22 05:38:55,917 INFO ]: Without dead ends: 12 [2018-06-22 05:38:55,918 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:38:55,918 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:38:55,919 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:38:55,919 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:38:55,921 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:38:55,921 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:38:55,921 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:38:55,921 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:38:55,921 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:38:55,921 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:38:55,921 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:38:55,921 INFO ]: Found error trace [2018-06-22 05:38:55,921 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:38:55,921 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:38:55,922 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 4 times [2018-06-22 05:38:55,922 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:38:55,922 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:38:55,922 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:55,922 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:38:55,923 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:55,971 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:56,137 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:56,137 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:38:56,137 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 05:38:56,143 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:38:56,168 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:38:56,168 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:56,171 INFO ]: Computing forward predicates... [2018-06-22 05:39:03,959 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:39:03,997 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:39:03,997 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-06-22 05:39:03,997 INFO ]: Interpolant automaton has 10 states [2018-06-22 05:39:03,998 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 05:39:03,998 INFO ]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:39:03,998 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 10 states. [2018-06-22 05:39:04,194 WARN ]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:39:05,222 WARN ]: Spent 931.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2018-06-22 05:39:05,440 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 19 [2018-06-22 05:39:05,441 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:39:05,441 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:39:05,441 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:39:05,441 INFO ]: Start accepts. Automaton has 10 states. Word has length 11 [2018-06-22 05:39:05,442 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:39:05,442 INFO ]: With dead ends: 13 [2018-06-22 05:39:05,442 INFO ]: Without dead ends: 13 [2018-06-22 05:39:05,442 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:39:05,442 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:39:05,444 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:39:05,444 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:39:05,444 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:39:05,444 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:39:05,444 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:39:05,444 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:39:05,444 INFO ]: Interpolant automaton has 10 states. [2018-06-22 05:39:05,444 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:39:05,445 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:39:05,445 INFO ]: Found error trace [2018-06-22 05:39:05,445 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:39:05,445 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:39:05,445 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 5 times [2018-06-22 05:39:05,445 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:39:05,445 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:39:05,446 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:39:05,446 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:39:05,446 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:39:05,520 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:39:05,689 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:39:05,689 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:39:05,689 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 05:39:05,702 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:39:05,778 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:39:05,778 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:39:05,781 INFO ]: Computing forward predicates... [2018-06-22 05:39:07,923 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:39:15,511 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 05:39:16,691 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:39:16,696 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-22 05:39:57,057 INFO ]: Timeout while computing interpolants [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Forcibly destroying the process [2018-06-22 05:39:57,258 WARN ]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:39:57,258 WARN ]: Verification canceled [2018-06-22 05:39:57,266 WARN ]: Timeout [2018-06-22 05:39:57,266 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:39:57 BoogieIcfgContainer [2018-06-22 05:39:57,266 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:39:57,267 INFO ]: Toolchain (without parser) took 67756.20 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 263.3 MB in the beginning and 736.8 MB in the end (delta: -473.4 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 05:39:57,268 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:39:57,269 INFO ]: ChcToBoogie took 192.37 ms. Allocated memory is still 308.8 MB. Free memory was 263.3 MB in the beginning and 261.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:39:57,270 INFO ]: Boogie Preprocessor took 146.15 ms. Allocated memory is still 308.8 MB. Free memory was 261.4 MB in the beginning and 259.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:39:57,270 INFO ]: RCFGBuilder took 396.08 ms. Allocated memory is still 308.8 MB. Free memory was 259.4 MB in the beginning and 249.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:39:57,271 INFO ]: TraceAbstraction took 67010.73 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 249.4 MB in the beginning and 736.8 MB in the end (delta: -487.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:39:57,279 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 192.37 ms. Allocated memory is still 308.8 MB. Free memory was 263.3 MB in the beginning and 261.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 146.15 ms. Allocated memory is still 308.8 MB. Free memory was 261.4 MB in the beginning and 259.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 396.08 ms. Allocated memory is still 308.8 MB. Free memory was 259.4 MB in the beginning and 249.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 67010.73 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 249.4 MB in the beginning and 736.8 MB in the end (delta: -487.4 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 (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 20494 quantified variables from 15 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 66.9s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 2.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 35 SDtfs, 8 SDslu, 73 SDs, 0 SdLazy, 35 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 0.3s SatisfiabilityAnalysisTime, 12.0s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 2437 SizeOfPredicates, 16 NumberOfNonLiveVariables, 452 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 0/40 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/nested.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-39-57-292.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-39-57-292.csv Completed graceful shutdown