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/nest-if7.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:43:39,423 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:43:39,459 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:43:39,474 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:43:39,474 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:43:39,475 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:43:39,476 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:43:39,478 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:43:39,479 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:43:39,481 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:43:39,481 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:43:39,482 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:43:39,482 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:43:39,483 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:43:39,488 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:43:39,488 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:43:39,490 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:43:39,503 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:43:39,504 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:43:39,505 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:43:39,506 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:43:39,511 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:43:39,511 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:43:39,512 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:43:39,512 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:43:39,515 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:43:39,516 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:43:39,517 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:43:39,518 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:43:39,518 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:43:39,519 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:43:39,519 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:43:39,519 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:43:39,520 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:43:39,521 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:43:39,525 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:43:39,541 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:43:39,542 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:43:39,542 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:43:39,542 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:43:39,543 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:43:39,544 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:43:39,544 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:43:39,544 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:43:39,544 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:43:39,545 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:43:39,545 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:43:39,545 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:43:39,545 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:43:39,545 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:43:39,545 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:43:39,546 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:43:39,546 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:43:39,547 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:43:39,547 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:43:39,584 INFO ]: Repository-Root is: /tmp [2018-06-22 05:43:39,645 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:43:39,649 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:43:39,650 INFO ]: Initializing SmtParser... [2018-06-22 05:43:39,650 INFO ]: SmtParser initialized [2018-06-22 05:43:39,651 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if7.c.smt2 [2018-06-22 05:43:39,699 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 05:43:40,204 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if7.c.smt2 unknown [2018-06-22 05:43:40,704 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if7.c.smt2 [2018-06-22 05:43:40,710 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:43:40,716 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:43:40,717 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:43:40,717 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:43:40,717 INFO ]: ChcToBoogie initialized [2018-06-22 05:43:40,973 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:43:40" (1/1) ... [2018-06-22 05:43:41,456 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41 Unit [2018-06-22 05:43:41,456 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:43:41,457 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:43:41,457 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:43:41,457 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:43:41,525 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,525 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,532 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,533 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,540 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,541 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,543 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (1/1) ... [2018-06-22 05:43:41,545 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:43:41,545 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:43:41,545 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:43:41,545 INFO ]: RCFGBuilder initialized [2018-06-22 05:43:41,547 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (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 05:43:41,580 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:43:41,580 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:43:41,580 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:43:41,580 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:43:41,580 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:43:41,580 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:43:42,445 INFO ]: Using library mode [2018-06-22 05:43:42,446 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:43:42 BoogieIcfgContainer [2018-06-22 05:43:42,446 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:43:42,450 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:43:42,450 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:43:42,617 INFO ]: TraceAbstraction initialized [2018-06-22 05:43:42,617 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:43:40" (1/3) ... [2018-06-22 05:43:42,618 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39066ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:43:42, skipping insertion in model container [2018-06-22 05:43:42,618 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:43:41" (2/3) ... [2018-06-22 05:43:42,619 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39066ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:43:42, skipping insertion in model container [2018-06-22 05:43:42,619 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:43:42" (3/3) ... [2018-06-22 05:43:42,622 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:43:42,682 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:43:42,755 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:43:43,129 INFO ]: Using default assertion order modulation [2018-06-22 05:43:43,129 INFO ]: Interprodecural is true [2018-06-22 05:43:43,129 INFO ]: Hoare is false [2018-06-22 05:43:43,129 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:43:43,129 INFO ]: Backedges is TWOTRACK [2018-06-22 05:43:43,129 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:43:43,129 INFO ]: Difference is false [2018-06-22 05:43:43,129 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:43:43,129 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:43:43,314 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:43:43,387 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:43:43,387 INFO ]: Found error trace [2018-06-22 05:43:43,410 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:43:43,410 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:43:43,450 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:43:43,497 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:43:43,497 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:43:43,664 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:43,664 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:43:43,664 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:43,744 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:43,934 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:43,937 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:43:43,937 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:43:43,939 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:43:43,954 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:43:43,955 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:43:43,957 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:43:44,067 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:43:44,067 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:43:44,068 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:43:44,077 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:43:44,077 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:43:44,137 INFO ]: With dead ends: 9 [2018-06-22 05:43:44,137 INFO ]: Without dead ends: 9 [2018-06-22 05:43:44,139 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:43:44,355 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:43:44,434 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:43:44,435 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:43:44,435 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:43:44,437 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:43:44,437 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:43:44,437 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:43:44,437 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:43:44,437 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:43:44,437 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:43:44,437 INFO ]: Found error trace [2018-06-22 05:43:44,437 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:43:44,438 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:43:44,438 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:43:44,438 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:43:44,438 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:43:44,439 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:44,439 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:43:44,439 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:44,523 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:44,706 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:44,706 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:43:44,706 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 05:43:44,724 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:43:44,791 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:44,820 INFO ]: Computing forward predicates... [2018-06-22 05:43:45,071 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:45,107 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:43:45,107 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:43:45,107 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:43:45,107 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:43:45,107 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:43:45,108 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:43:45,274 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:43:45,274 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:43:45,274 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:43:45,274 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:43:45,274 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:43:45,275 INFO ]: With dead ends: 10 [2018-06-22 05:43:45,275 INFO ]: Without dead ends: 10 [2018-06-22 05:43:45,275 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:43:45,275 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:43:45,276 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:43:45,276 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:43:45,277 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:43:45,277 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:43:45,277 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:43:45,277 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:43:45,277 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:43:45,277 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:43:45,277 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:43:45,277 INFO ]: Found error trace [2018-06-22 05:43:45,277 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:43:45,277 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:43:45,278 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:43:45,278 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:43:45,278 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:43:45,279 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:45,279 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:43:45,279 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:45,325 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:45,487 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:45,487 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:43:45,487 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 05:43:45,493 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:43:45,571 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:43:45,571 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:45,575 INFO ]: Computing forward predicates... [2018-06-22 05:43:47,397 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:47,418 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:43:47,418 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:43:47,418 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:43:47,418 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:43:47,418 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:43:47,418 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:43:47,571 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:43:47,571 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:43:47,571 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:43:47,571 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:43:47,571 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:43:47,571 INFO ]: With dead ends: 11 [2018-06-22 05:43:47,571 INFO ]: Without dead ends: 11 [2018-06-22 05:43:47,572 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:43:47,572 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:43:47,573 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:43:47,573 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:43:47,573 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:43:47,573 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:43:47,573 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:43:47,573 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:43:47,573 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:43:47,573 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:43:47,574 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:43:47,574 INFO ]: Found error trace [2018-06-22 05:43:47,574 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:43:47,574 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:43:47,574 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:43:47,574 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:43:47,574 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:43:47,575 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:47,575 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:43:47,575 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:47,615 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:47,766 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:47,766 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:43:47,860 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 05:43:47,871 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:43:47,940 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:43:47,940 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:47,944 INFO ]: Computing forward predicates... [2018-06-22 05:43:51,443 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:51,464 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:43:51,464 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:43:51,464 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:43:51,464 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:43:51,464 INFO ]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:43:51,465 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:43:51,647 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:43:51,647 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:43:51,647 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:43:51,647 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:43:51,648 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:43:51,648 INFO ]: With dead ends: 12 [2018-06-22 05:43:51,648 INFO ]: Without dead ends: 12 [2018-06-22 05:43:51,648 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:43:51,648 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:43:51,650 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:43:51,650 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:43:51,650 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:43:51,650 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:43:51,650 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:43:51,650 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:43:51,650 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:43:51,650 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:43:51,651 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:43:51,651 INFO ]: Found error trace [2018-06-22 05:43:51,651 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:43:51,651 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:43:51,651 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:43:51,651 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:43:51,651 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:43:51,652 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:51,652 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:43:51,652 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:43:51,706 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:51,919 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:43:51,920 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:43:51,920 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 05:43:51,926 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:43:51,966 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:43:51,966 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:43:51,970 INFO ]: Computing forward predicates... [2018-06-22 05:43:52,528 WARN ]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 05:44:16,011 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:44:17,698 WARN ]: expecting exponential blowup for input size 7 Received shutdown request... [2018-06-22 05:44:46,044 INFO ]: Timeout while computing interpolants [2018-06-22 05:44:46,244 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:44:46,245 WARN ]: Verification canceled [2018-06-22 05:44:46,339 WARN ]: Timeout [2018-06-22 05:44:46,339 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:44:46 BoogieIcfgContainer [2018-06-22 05:44:46,339 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:44:46,348 INFO ]: Toolchain (without parser) took 65637.82 ms. Allocated memory was 306.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 259.1 MB in the beginning and 565.6 MB in the end (delta: -306.5 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 05:44:46,349 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 271.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:44:46,350 INFO ]: ChcToBoogie took 739.39 ms. Allocated memory is still 306.7 MB. Free memory was 259.1 MB in the beginning and 255.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:44:46,350 INFO ]: Boogie Preprocessor took 88.21 ms. Allocated memory is still 306.7 MB. Free memory is still 255.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:44:46,350 INFO ]: RCFGBuilder took 900.37 ms. Allocated memory is still 306.7 MB. Free memory was 255.1 MB in the beginning and 243.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:44:46,351 INFO ]: TraceAbstraction took 63889.67 ms. Allocated memory was 306.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 243.1 MB in the beginning and 565.6 MB in the end (delta: -322.4 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 05:44:46,358 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 306.7 MB. Free memory is still 271.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 739.39 ms. Allocated memory is still 306.7 MB. Free memory was 259.1 MB in the beginning and 255.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 88.21 ms. Allocated memory is still 306.7 MB. Free memory is still 255.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 900.37 ms. Allocated memory is still 306.7 MB. Free memory was 255.1 MB in the beginning and 243.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63889.67 ms. Allocated memory was 306.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 243.1 MB in the beginning and 565.6 MB in the end (delta: -322.4 MB). Peak memory consumption was 1.4 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 12 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 29181 quantified variables from 14 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 63.2s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 4 SDslu, 60 SDs, 0 SdLazy, 25 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=4, 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: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1567 SizeOfPredicates, 15 NumberOfNonLiveVariables, 375 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/20 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/nest-if7.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-44-46-390.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if7.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-44-46-390.csv Completed graceful shutdown