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/gulwani_cegar1.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:26:14,281 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:26:14,283 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:26:14,298 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:26:14,298 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:26:14,299 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:26:14,300 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:26:14,305 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:26:14,306 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:26:14,307 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:26:14,308 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:26:14,308 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:26:14,311 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:26:14,312 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:26:14,313 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:26:14,313 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:26:14,315 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:26:14,317 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:26:14,318 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:26:14,319 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:26:14,320 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:26:14,323 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:26:14,323 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:26:14,323 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:26:14,324 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:26:14,325 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:26:14,326 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:26:14,326 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:26:14,327 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:26:14,328 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:26:14,328 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:26:14,329 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:26:14,329 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:26:14,330 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:26:14,330 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:26:14,331 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:26:14,343 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:26:14,344 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:26:14,344 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:26:14,344 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:26:14,345 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:26:14,346 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:26:14,346 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:26:14,346 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:26:14,346 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:26:14,346 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:26:14,347 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:26:14,347 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:26:14,347 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:26:14,347 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:26:14,347 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:26:14,348 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:26:14,348 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:26:14,349 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:26:14,349 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:26:14,388 INFO ]: Repository-Root is: /tmp [2018-06-22 05:26:14,402 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:26:14,409 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:26:14,411 INFO ]: Initializing SmtParser... [2018-06-22 05:26:14,411 INFO ]: SmtParser initialized [2018-06-22 05:26:14,412 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar1.c.smt2 [2018-06-22 05:26:14,413 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 05:26:14,503 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar1.c.smt2 unknown [2018-06-22 05:26:14,811 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_cegar1.c.smt2 [2018-06-22 05:26:14,818 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:26:14,826 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:26:14,827 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:26:14,827 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:26:14,827 INFO ]: ChcToBoogie initialized [2018-06-22 05:26:14,831 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:26:14" (1/1) ... [2018-06-22 05:26:14,895 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:26:14 Unit [2018-06-22 05:26:14,896 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:26:14,896 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:26:14,896 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:26:14,896 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:26:14,918 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:26:14" (1/1) ... [2018-06-22 05:26:14,918 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:26:14" (1/1) ... [2018-06-22 05:26:14,925 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:26:14" (1/1) ... [2018-06-22 05:26:14,925 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:26:14" (1/1) ... [2018-06-22 05:26:14,937 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:26:14" (1/1) ... [2018-06-22 05:26:14,939 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:26:14" (1/1) ... [2018-06-22 05:26:14,941 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:26:14" (1/1) ... [2018-06-22 05:26:14,949 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:26:14,949 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:26:14,949 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:26:14,949 INFO ]: RCFGBuilder initialized [2018-06-22 05:26:14,950 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:26:14" (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 05:26:14,974 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:26:14,974 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:26:14,974 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:26:14,974 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:26:14,974 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:26:14,974 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 05:26:15,194 INFO ]: Using library mode [2018-06-22 05:26:15,195 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:26:15 BoogieIcfgContainer [2018-06-22 05:26:15,195 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:26:15,206 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:26:15,206 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:26:15,209 INFO ]: TraceAbstraction initialized [2018-06-22 05:26:15,209 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:26:14" (1/3) ... [2018-06-22 05:26:15,210 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e31a97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:26:15, skipping insertion in model container [2018-06-22 05:26:15,210 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:26:14" (2/3) ... [2018-06-22 05:26:15,210 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e31a97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:26:15, skipping insertion in model container [2018-06-22 05:26:15,210 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:26:15" (3/3) ... [2018-06-22 05:26:15,212 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:26:15,231 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:26:15,250 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:26:15,317 INFO ]: Using default assertion order modulation [2018-06-22 05:26:15,317 INFO ]: Interprodecural is true [2018-06-22 05:26:15,317 INFO ]: Hoare is false [2018-06-22 05:26:15,317 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:26:15,317 INFO ]: Backedges is TWOTRACK [2018-06-22 05:26:15,317 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:26:15,317 INFO ]: Difference is false [2018-06-22 05:26:15,317 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:26:15,318 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:26:15,332 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:26:15,343 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:26:15,343 INFO ]: Found error trace [2018-06-22 05:26:15,344 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:26:15,344 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:26:15,351 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:26:15,352 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:26:15,353 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:26:15,391 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:26:15,391 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:26:15,391 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:26:15,455 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:26:15,550 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:26:15,552 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:26:15,552 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:26:15,554 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:26:15,566 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:26:15,567 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:26:15,570 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:26:15,628 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:26:15,628 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:26:15,629 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:26:15,630 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:26:15,630 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:26:15,638 INFO ]: With dead ends: 9 [2018-06-22 05:26:15,638 INFO ]: Without dead ends: 9 [2018-06-22 05:26:15,640 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 05:26:15,653 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:26:15,685 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:26:15,686 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:26:15,687 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:26:15,689 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:26:15,689 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:26:15,690 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:26:15,690 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:26:15,690 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:26:15,690 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:26:15,690 INFO ]: Found error trace [2018-06-22 05:26:15,690 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:26:15,690 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:26:15,690 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:26:15,691 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:26:15,691 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:26:15,691 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:26:15,691 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:26:15,692 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:26:15,753 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:26:15,919 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:26:15,919 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:26:15,919 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 05:26:15,931 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:26:15,988 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:26:16,002 INFO ]: Computing forward predicates... [2018-06-22 05:26:17,757 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:26:17,791 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:26:17,791 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:26:17,792 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:26:17,792 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:26:17,792 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:26:17,792 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:26:18,005 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:26:18,005 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:26:18,006 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 05:26:18,006 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:26:18,006 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:26:18,006 INFO ]: With dead ends: 10 [2018-06-22 05:26:18,007 INFO ]: Without dead ends: 10 [2018-06-22 05:26:18,007 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:26:18,007 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:26:18,008 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:26:18,008 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:26:18,009 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:26:18,009 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:26:18,009 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:26:18,009 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:26:18,009 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:26:18,009 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:26:18,009 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:26:18,009 INFO ]: Found error trace [2018-06-22 05:26:18,009 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:26:18,010 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:26:18,011 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:26:18,011 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:26:18,011 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:26:18,012 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:26:18,012 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:26:18,012 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:26:18,073 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:26:18,599 WARN ]: Spent 298.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-22 05:26:18,611 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:26:18,611 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:26:18,611 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 05:26:18,620 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:26:18,685 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:26:18,685 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:26:18,689 INFO ]: Computing forward predicates... [2018-06-22 05:26:20,287 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:26:20,318 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:26:20,318 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:26:20,318 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:26:20,318 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:26:20,318 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:26:20,318 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:26:20,370 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:26:20,370 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:26:20,371 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:26:20,371 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:26:20,371 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:26:20,372 INFO ]: With dead ends: 11 [2018-06-22 05:26:20,372 INFO ]: Without dead ends: 11 [2018-06-22 05:26:20,372 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:26:20,372 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:26:20,373 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:26:20,373 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:26:20,374 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:26:20,374 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:26:20,374 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:26:20,374 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:26:20,374 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:26:20,374 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:26:20,374 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:26:20,374 INFO ]: Found error trace [2018-06-22 05:26:20,374 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:26:20,374 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:26:20,374 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:26:20,374 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:26:20,374 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:26:20,375 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:26:20,375 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:26:20,375 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:26:20,410 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:26:20,564 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:26:20,564 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:26:20,564 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 05:26:20,575 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:26:20,620 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:26:20,620 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:26:20,623 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 05:27:25,626 INFO ]: Timeout while computing interpolants [2018-06-22 05:27:25,844 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:27:25,845 WARN ]: Verification canceled [2018-06-22 05:27:25,850 WARN ]: Timeout [2018-06-22 05:27:25,850 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:27:25 BoogieIcfgContainer [2018-06-22 05:27:25,850 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:27:25,851 INFO ]: Toolchain (without parser) took 71032.55 ms. Allocated memory was 303.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 256.6 MB in the beginning and 1.1 GB in the end (delta: -820.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:27:25,852 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 303.0 MB. Free memory is still 268.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:27:25,854 INFO ]: ChcToBoogie took 69.24 ms. Allocated memory is still 303.0 MB. Free memory was 255.6 MB in the beginning and 253.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:27:25,855 INFO ]: Boogie Preprocessor took 52.71 ms. Allocated memory is still 303.0 MB. Free memory was 253.6 MB in the beginning and 252.6 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. [2018-06-22 05:27:25,856 INFO ]: RCFGBuilder took 245.58 ms. Allocated memory is still 303.0 MB. Free memory was 252.6 MB in the beginning and 242.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:27:25,856 INFO ]: TraceAbstraction took 70644.34 ms. Allocated memory was 303.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 242.6 MB in the beginning and 1.1 GB in the end (delta: -834.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:27:25,867 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 303.0 MB. Free memory is still 268.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 69.24 ms. Allocated memory is still 303.0 MB. Free memory was 255.6 MB in the beginning and 253.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 52.71 ms. Allocated memory is still 303.0 MB. Free memory was 253.6 MB in the beginning and 252.6 MB in the end (delta: 996.3 kB). Peak memory consumption was 996.3 kB. Max. memory is 3.6 GB. * RCFGBuilder took 245.58 ms. Allocated memory is still 303.0 MB. Free memory was 252.6 MB in the beginning and 242.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 70644.34 ms. Allocated memory was 303.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 242.6 MB in the beginning and 1.1 GB in the end (delta: -834.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 11 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 14 quantified variables from 17 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 70.5s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 1 SDslu, 34 SDs, 0 SdLazy, 17 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 581 SizeOfPredicates, 10 NumberOfNonLiveVariables, 201 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulwani_cegar1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-27-25-920.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulwani_cegar1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-27-25-920.csv Completed graceful shutdown