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-if4.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:41:16,743 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:41:16,748 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:41:16,762 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:41:16,763 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:41:16,764 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:41:16,765 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:41:16,769 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:41:16,771 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:41:16,771 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:41:16,773 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:41:16,773 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:41:16,774 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:41:16,775 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:41:16,778 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:41:16,779 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:41:16,781 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:41:16,783 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:41:16,797 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:41:16,798 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:41:16,799 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:41:16,802 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:41:16,802 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:41:16,802 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:41:16,803 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:41:16,804 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:41:16,805 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:41:16,810 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:41:16,811 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:41:16,811 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:41:16,812 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:41:16,813 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:41:16,813 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:41:16,814 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:41:16,821 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:41:16,821 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:41:16,842 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:41:16,842 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:41:16,842 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:41:16,843 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:41:16,844 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:41:16,844 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:41:16,844 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:41:16,844 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:41:16,844 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:41:16,845 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:41:16,845 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:41:16,845 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:41:16,846 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:41:16,846 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:41:16,846 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:41:16,846 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:41:16,846 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:41:16,848 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:41:16,848 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:41:16,905 INFO ]: Repository-Root is: /tmp [2018-06-22 05:41:16,920 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:41:16,925 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:41:16,926 INFO ]: Initializing SmtParser... [2018-06-22 05:41:16,927 INFO ]: SmtParser initialized [2018-06-22 05:41:16,927 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if4.c.smt2 [2018-06-22 05:41:16,929 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 05:41:17,733 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if4.c.smt2 unknown [2018-06-22 05:41:18,451 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if4.c.smt2 [2018-06-22 05:41:18,456 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:41:18,462 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:41:18,462 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:41:18,462 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:41:18,462 INFO ]: ChcToBoogie initialized [2018-06-22 05:41:18,467 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,768 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18 Unit [2018-06-22 05:41:18,768 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:41:18,770 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:41:18,770 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:41:18,770 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:41:18,885 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,885 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,893 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,893 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,902 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,904 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,907 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... [2018-06-22 05:41:18,909 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:41:18,910 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:41:18,910 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:41:18,910 INFO ]: RCFGBuilder initialized [2018-06-22 05:41:18,911 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 05:41:19,010 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:41:19,010 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:41:19,010 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:41:19,010 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:41:19,010 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:41:19,010 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:41:19,334 INFO ]: Using library mode [2018-06-22 05:41:19,334 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:41:19 BoogieIcfgContainer [2018-06-22 05:41:19,335 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:41:19,336 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:41:19,336 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:41:19,339 INFO ]: TraceAbstraction initialized [2018-06-22 05:41:19,339 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:41:18" (1/3) ... [2018-06-22 05:41:19,340 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65802213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:41:19, skipping insertion in model container [2018-06-22 05:41:19,340 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:41:18" (2/3) ... [2018-06-22 05:41:19,341 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65802213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:41:19, skipping insertion in model container [2018-06-22 05:41:19,341 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:41:19" (3/3) ... [2018-06-22 05:41:19,342 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:41:19,379 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:41:19,389 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:41:19,577 INFO ]: Using default assertion order modulation [2018-06-22 05:41:19,577 INFO ]: Interprodecural is true [2018-06-22 05:41:19,577 INFO ]: Hoare is false [2018-06-22 05:41:19,577 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:41:19,577 INFO ]: Backedges is TWOTRACK [2018-06-22 05:41:19,578 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:41:19,578 INFO ]: Difference is false [2018-06-22 05:41:19,578 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:41:19,578 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:41:19,659 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:41:19,684 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:41:19,684 INFO ]: Found error trace [2018-06-22 05:41:19,685 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:41:19,685 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:41:19,690 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:41:19,691 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:41:19,692 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:41:19,834 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:19,834 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:41:19,834 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:19,982 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:20,089 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:20,092 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:41:20,092 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:41:20,102 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:41:20,180 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:41:20,180 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:41:20,215 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:41:20,427 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:41:20,428 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:41:20,429 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:41:20,430 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:41:20,431 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:41:20,445 INFO ]: With dead ends: 9 [2018-06-22 05:41:20,445 INFO ]: Without dead ends: 9 [2018-06-22 05:41:20,449 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 05:41:20,605 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:41:20,645 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:41:20,710 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:41:20,711 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:41:20,713 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:41:20,713 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:41:20,713 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:41:20,713 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:41:20,713 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:41:20,713 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:41:20,713 INFO ]: Found error trace [2018-06-22 05:41:20,714 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:41:20,714 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:41:20,714 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:41:20,714 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:41:20,714 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:41:20,715 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:20,715 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:41:20,716 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:20,805 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:20,979 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:20,979 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:41:20,979 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 05:41:20,986 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:41:21,040 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:21,050 INFO ]: Computing forward predicates... [2018-06-22 05:41:21,518 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:21,545 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:41:21,545 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:41:21,546 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:41:21,546 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:41:21,546 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:41:21,546 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:41:21,627 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:41:21,627 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:41:21,627 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:41:21,627 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:41:21,627 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:41:21,628 INFO ]: With dead ends: 10 [2018-06-22 05:41:21,628 INFO ]: Without dead ends: 10 [2018-06-22 05:41:21,628 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 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 05:41:21,629 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:41:21,629 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:41:21,629 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:41:21,630 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:41:21,630 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:41:21,630 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:41:21,630 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:41:21,630 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:41:21,630 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:41:21,630 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:41:21,630 INFO ]: Found error trace [2018-06-22 05:41:21,631 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:41:21,631 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:41:21,631 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:41:21,631 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:41:21,631 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:41:21,632 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:21,632 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:41:21,632 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:21,688 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:21,977 WARN ]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:41:21,978 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:21,979 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:41:21,979 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) [2018-06-22 05:41:21,994 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:41:22,089 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:41:22,089 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:22,092 INFO ]: Computing forward predicates... [2018-06-22 05:41:25,644 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:25,664 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:41:25,695 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:41:25,695 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:41:25,695 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:41:25,695 INFO ]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:41:25,695 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:41:25,777 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:41:25,777 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:41:25,777 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:41:25,777 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:41:25,777 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:41:25,778 INFO ]: With dead ends: 11 [2018-06-22 05:41:25,778 INFO ]: Without dead ends: 11 [2018-06-22 05:41:25,778 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:41:25,778 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:41:25,779 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:41:25,779 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:41:25,780 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:41:25,780 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:41:25,780 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:41:25,780 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:41:25,780 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:41:25,780 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:41:25,780 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:41:25,780 INFO ]: Found error trace [2018-06-22 05:41:25,780 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:41:25,780 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:41:25,780 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:41:25,781 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:41:25,781 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:41:25,781 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:25,781 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:41:25,781 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:25,846 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:25,962 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:25,962 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:41:25,962 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 05:41:25,968 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:41:26,012 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:41:26,012 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:26,015 INFO ]: Computing forward predicates... [2018-06-22 05:41:42,589 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 8 [2018-06-22 05:41:42,894 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:41:45,411 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:45,431 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:41:45,432 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 05:41:45,432 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:41:45,432 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:41:45,432 INFO ]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:41:45,432 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2018-06-22 05:41:45,523 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:41:45,523 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:41:45,523 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:41:45,523 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-22 05:41:45,523 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:41:45,524 INFO ]: With dead ends: 12 [2018-06-22 05:41:45,524 INFO ]: Without dead ends: 12 [2018-06-22 05:41:45,524 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:41:45,524 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:41:45,525 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:41:45,525 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:41:45,526 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:41:45,526 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:41:45,526 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:41:45,526 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:41:45,526 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:41:45,526 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:41:45,526 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:41:45,526 INFO ]: Found error trace [2018-06-22 05:41:45,526 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:41:45,527 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:41:45,527 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:41:45,527 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:41:45,527 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:41:45,527 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:45,527 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:41:45,527 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:41:45,575 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:45,756 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:41:45,756 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:41:45,756 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 05:41:45,765 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:41:45,816 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:41:45,816 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:41:45,819 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 05:42:28,793 INFO ]: Timeout while computing interpolants [2018-06-22 05:42:28,993 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:42:28,993 WARN ]: Verification canceled [2018-06-22 05:42:28,997 WARN ]: Timeout [2018-06-22 05:42:28,997 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:42:28 BoogieIcfgContainer [2018-06-22 05:42:28,997 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:42:28,998 INFO ]: Toolchain (without parser) took 70541.63 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 261.2 MB in the beginning and 682.3 MB in the end (delta: -421.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:42:28,998 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:42:28,999 INFO ]: ChcToBoogie took 306.39 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:42:28,999 INFO ]: Boogie Preprocessor took 139.36 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:42:29,000 INFO ]: RCFGBuilder took 424.57 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 247.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:42:29,000 INFO ]: TraceAbstraction took 69661.49 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.2 MB in the beginning and 682.3 MB in the end (delta: -435.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:42:29,015 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 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 306.39 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 139.36 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 424.57 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 247.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 69661.49 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.2 MB in the beginning and 682.3 MB in the end (delta: -435.1 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 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 15804 quantified variables from 16 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 69.4s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 28 SDtfs, 5 SDslu, 56 SDs, 0 SdLazy, 24 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 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, 24.1s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1085 SizeOfPredicates, 15 NumberOfNonLiveVariables, 381 ConjunctsInSsa, 72 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-if4.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-42-29-028.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if4.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-42-29-028.csv Completed graceful shutdown