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/string_concat-noarr.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:58:51,252 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:58:51,255 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:58:51,268 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:58:51,269 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:58:51,270 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:58:51,274 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:58:51,276 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:58:51,278 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:58:51,279 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:58:51,280 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:58:51,280 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:58:51,281 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:58:51,282 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:58:51,283 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:58:51,284 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:58:51,286 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:58:51,290 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:58:51,293 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:58:51,294 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:58:51,295 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:58:51,298 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:58:51,299 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:58:51,299 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:58:51,300 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:58:51,301 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:58:51,302 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:58:51,303 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:58:51,304 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:58:51,304 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:58:51,305 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:58:51,306 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:58:51,306 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:58:51,307 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:58:51,308 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:58:51,308 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:58:51,322 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:58:51,323 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:58:51,323 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:58:51,323 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:58:51,325 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:58:51,325 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:58:51,325 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:58:51,325 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:58:51,326 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:58:51,326 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:58:51,326 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:58:51,326 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:58:51,326 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:58:51,327 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:58:51,327 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:58:51,327 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:58:51,327 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:58:51,329 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:58:51,329 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:58:51,371 INFO ]: Repository-Root is: /tmp [2018-06-22 05:58:51,394 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:58:51,401 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:58:51,403 INFO ]: Initializing SmtParser... [2018-06-22 05:58:51,404 INFO ]: SmtParser initialized [2018-06-22 05:58:51,404 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/string_concat-noarr.c.smt2 [2018-06-22 05:58:51,406 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 05:58:51,510 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/string_concat-noarr.c.smt2 unknown [2018-06-22 05:58:51,799 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/string_concat-noarr.c.smt2 [2018-06-22 05:58:51,804 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:58:51,811 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:58:51,811 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:58:51,811 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:58:51,811 INFO ]: ChcToBoogie initialized [2018-06-22 05:58:51,815 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:58:51" (1/1) ... [2018-06-22 05:58:51,886 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:58:51 Unit [2018-06-22 05:58:51,886 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:58:51,887 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:58:51,887 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:58:51,887 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:58:51,910 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:58:51" (1/1) ... [2018-06-22 05:58:51,910 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:58:51" (1/1) ... [2018-06-22 05:58:51,921 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:58:51" (1/1) ... [2018-06-22 05:58:51,921 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:58:51" (1/1) ... [2018-06-22 05:58:51,937 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:58:51" (1/1) ... [2018-06-22 05:58:51,939 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:58:51" (1/1) ... [2018-06-22 05:58:51,941 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:58:51" (1/1) ... [2018-06-22 05:58:51,943 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:58:51,943 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:58:51,943 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:58:51,943 INFO ]: RCFGBuilder initialized [2018-06-22 05:58:51,954 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:58:51" (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 05:58:51,968 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:58:51,968 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:58:51,968 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:58:51,968 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:58:51,968 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:58:51,968 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 05:58:52,197 INFO ]: Using library mode [2018-06-22 05:58:52,198 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:58:52 BoogieIcfgContainer [2018-06-22 05:58:52,198 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:58:52,209 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:58:52,209 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:58:52,213 INFO ]: TraceAbstraction initialized [2018-06-22 05:58:52,213 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:58:51" (1/3) ... [2018-06-22 05:58:52,214 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632ea2fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:58:52, skipping insertion in model container [2018-06-22 05:58:52,214 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:58:51" (2/3) ... [2018-06-22 05:58:52,214 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632ea2fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:58:52, skipping insertion in model container [2018-06-22 05:58:52,215 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:58:52" (3/3) ... [2018-06-22 05:58:52,225 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:58:52,237 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:58:52,260 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:58:52,329 INFO ]: Using default assertion order modulation [2018-06-22 05:58:52,330 INFO ]: Interprodecural is true [2018-06-22 05:58:52,330 INFO ]: Hoare is false [2018-06-22 05:58:52,330 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:58:52,330 INFO ]: Backedges is TWOTRACK [2018-06-22 05:58:52,330 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:58:52,330 INFO ]: Difference is false [2018-06-22 05:58:52,330 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:58:52,330 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:58:52,345 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:58:52,357 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:58:52,357 INFO ]: Found error trace [2018-06-22 05:58:52,358 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:58:52,358 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:58:52,367 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 05:58:52,370 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:58:52,370 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:58:52,413 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:52,413 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:58:52,413 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:52,456 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:52,546 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:52,549 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:58:52,549 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:58:52,551 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:58:52,563 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:58:52,564 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:58:52,566 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:58:52,635 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:58:52,636 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:58:52,638 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:58:52,640 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:58:52,640 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:58:52,649 INFO ]: With dead ends: 9 [2018-06-22 05:58:52,649 INFO ]: Without dead ends: 9 [2018-06-22 05:58:52,651 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 05:58:52,666 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:58:52,696 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:58:52,697 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:58:52,698 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:58:52,699 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:58:52,699 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:58:52,699 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:58:52,699 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:58:52,699 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:58:52,699 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:58:52,699 INFO ]: Found error trace [2018-06-22 05:58:52,700 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:58:52,700 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:58:52,700 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 05:58:52,700 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:58:52,700 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:58:52,701 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:52,701 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:58:52,701 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:52,725 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:52,829 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:52,830 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:58:52,830 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 05:58:52,837 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:58:52,886 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:52,895 INFO ]: Computing forward predicates... [2018-06-22 05:58:53,271 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:53,293 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:58:53,293 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:58:53,294 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:58:53,294 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:58:53,294 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:58:53,295 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:58:53,442 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:58:53,442 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:58:53,443 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:58:53,443 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:58:53,443 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:58:53,443 INFO ]: With dead ends: 10 [2018-06-22 05:58:53,443 INFO ]: Without dead ends: 10 [2018-06-22 05:58:53,444 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 05:58:53,444 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:58:53,446 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:58:53,446 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:58:53,446 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:58:53,446 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:58:53,446 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:58:53,446 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:58:53,446 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:58:53,446 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:58:53,447 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:58:53,447 INFO ]: Found error trace [2018-06-22 05:58:53,448 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:58:53,448 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:58:53,449 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 05:58:53,449 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:58:53,449 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:58:53,452 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:53,452 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:58:53,452 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:53,490 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:53,758 WARN ]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:58:53,827 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:53,827 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:58:53,827 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 05:58:53,836 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:58:53,914 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:58:53,914 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:53,917 INFO ]: Computing forward predicates... [2018-06-22 05:58:54,834 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:54,866 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:58:54,866 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:58:54,866 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:58:54,866 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:58:54,866 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:58:54,867 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:58:55,194 WARN ]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:58:55,272 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:58:55,273 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:58:55,273 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:58:55,273 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:58:55,273 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:58:55,273 INFO ]: With dead ends: 11 [2018-06-22 05:58:55,273 INFO ]: Without dead ends: 11 [2018-06-22 05:58:55,274 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:58:55,274 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:58:55,275 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:58:55,275 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:58:55,275 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:58:55,276 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:58:55,276 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:58:55,276 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:58:55,276 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:58:55,276 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:58:55,276 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:58:55,276 INFO ]: Found error trace [2018-06-22 05:58:55,276 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:58:55,276 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:58:55,276 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 3 times [2018-06-22 05:58:55,276 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:58:55,276 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:58:55,278 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:55,278 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:58:55,278 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:58:55,313 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:55,699 WARN ]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 05:58:55,879 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:58:55,892 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:58:55,892 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:58:55,892 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 05:58:55,906 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:58:55,985 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:58:55,985 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:58:55,989 INFO ]: Computing forward predicates... [2018-06-22 05:59:00,861 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:00,900 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:59:00,900 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:59:00,901 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:59:00,901 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:59:00,901 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:59:00,901 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:59:01,278 WARN ]: Spent 309.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-06-22 05:59:01,376 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:59:01,377 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:59:01,377 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:59:01,377 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:59:01,377 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:59:01,377 INFO ]: With dead ends: 12 [2018-06-22 05:59:01,377 INFO ]: Without dead ends: 12 [2018-06-22 05:59:01,377 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:59:01,377 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:59:01,378 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:59:01,378 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:59:01,378 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:59:01,378 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:59:01,379 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:59:01,379 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:59:01,379 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:59:01,379 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:59:01,379 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:59:01,379 INFO ]: Found error trace [2018-06-22 05:59:01,379 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:59:01,379 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:59:01,379 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 4 times [2018-06-22 05:59:01,379 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:59:01,379 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:59:01,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:01,382 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:59:01,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:01,418 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:01,632 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:01,632 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:59:01,632 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 05:59:01,641 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:59:01,679 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:59:01,680 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:01,684 INFO ]: Computing forward predicates... [2018-06-22 05:59:12,506 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:59:14,465 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:14,485 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:59:14,485 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 05:59:14,485 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:59:14,485 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:59:14,486 INFO ]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:59:14,486 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2018-06-22 05:59:14,684 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:59:14,684 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:59:14,684 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:59:14,684 INFO ]: Start accepts. Automaton has 9 states. Word has length 11 [2018-06-22 05:59:14,684 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:59:14,684 INFO ]: With dead ends: 14 [2018-06-22 05:59:14,684 INFO ]: Without dead ends: 14 [2018-06-22 05:59:14,685 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2018-06-22 05:59:14,685 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:59:14,686 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:59:14,686 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:59:14,687 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:59:14,687 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-06-22 05:59:14,687 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:59:14,687 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:59:14,687 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:59:14,687 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:59:14,687 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:59:14,687 INFO ]: Found error trace [2018-06-22 05:59:14,687 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:59:14,688 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:59:14,688 INFO ]: Analyzing trace with hash 679342766, now seen corresponding path program 5 times [2018-06-22 05:59:14,688 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:59:14,688 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:59:14,688 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:14,689 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:59:14,689 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:14,777 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:15,100 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:15,100 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:59:15,100 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:59:15,107 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:59:15,204 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:59:15,204 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:15,209 INFO ]: Computing forward predicates... [2018-06-22 05:59:15,923 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 05:59:15,932 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 05:59:23,841 WARN ]: Spent 237.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 15 [2018-06-22 05:59:24,045 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Forcibly destroying the process [2018-06-22 05:59:24,246 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:59:24,246 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2018-06-22 05:59:24,246 INFO ]: Interpolant automaton has 15 states [2018-06-22 05:59:24,246 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 05:59:24,246 INFO ]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:59:24,248 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 15 states. [2018-06-22 05:59:24,586 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:59:24,586 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:59:24,586 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 05:59:24,586 INFO ]: Start accepts. Automaton has 15 states. Word has length 13 [2018-06-22 05:59:24,586 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:59:24,586 INFO ]: With dead ends: 15 [2018-06-22 05:59:24,586 INFO ]: Without dead ends: 15 [2018-06-22 05:59:24,587 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2018-06-22 05:59:24,587 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 05:59:24,588 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 05:59:24,588 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 05:59:24,589 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 05:59:24,589 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 05:59:24,589 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:59:24,589 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 05:59:24,589 INFO ]: Interpolant automaton has 15 states. [2018-06-22 05:59:24,589 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 05:59:24,590 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 05:59:24,590 INFO ]: Found error trace [2018-06-22 05:59:24,590 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:59:24,590 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:59:24,590 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 6 times [2018-06-22 05:59:24,590 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:59:24,590 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:59:24,591 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:24,591 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:59:24,591 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:59:24,689 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:26,022 WARN ]: Spent 975.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-06-22 05:59:26,132 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2018-06-22 05:59:26,347 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:59:26,347 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:59:26,347 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:59:26,393 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:59:26,454 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-22 05:59:26,454 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:59:26,459 INFO ]: Computing forward predicates... [2018-06-22 05:59:26,762 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:59:31,525 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 17 [2018-06-22 05:59:34,123 WARN ]: expecting exponential blowup for input size 7 Received shutdown request... [2018-06-22 05:59:56,617 INFO ]: Timeout while computing interpolants [2018-06-22 05:59:56,818 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:59:56,818 WARN ]: Verification canceled [2018-06-22 05:59:56,822 WARN ]: Timeout [2018-06-22 05:59:56,822 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:59:56 BoogieIcfgContainer [2018-06-22 05:59:56,822 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:59:56,823 INFO ]: Toolchain (without parser) took 65018.42 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 260.6 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:59:56,825 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:59:56,825 INFO ]: ChcToBoogie took 74.92 ms. Allocated memory is still 306.2 MB. Free memory was 259.6 MB in the beginning and 257.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:59:56,826 INFO ]: Boogie Preprocessor took 56.31 ms. Allocated memory is still 306.2 MB. Free memory was 257.6 MB in the beginning and 256.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 05:59:56,826 INFO ]: RCFGBuilder took 254.83 ms. Allocated memory is still 306.2 MB. Free memory was 256.6 MB in the beginning and 246.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:59:56,827 INFO ]: TraceAbstraction took 64613.19 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 246.6 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:59:56,832 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.10 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 74.92 ms. Allocated memory is still 306.2 MB. Free memory was 259.6 MB in the beginning and 257.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 56.31 ms. Allocated memory is still 306.2 MB. Free memory was 257.6 MB in the beginning and 256.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 254.83 ms. Allocated memory is still 306.2 MB. Free memory was 256.6 MB in the beginning and 246.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 64613.19 ms. Allocated memory was 306.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 246.6 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). 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 15 with TraceHistMax 7, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 14524 quantified variables from 6 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 64.5s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 1.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 15 SDslu, 102 SDs, 0 SdLazy, 47 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=6, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 29.4s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 4754 SizeOfPredicates, 25 NumberOfNonLiveVariables, 707 ConjunctsInSsa, 190 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/82 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/string_concat-noarr.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-59-56-845.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/string_concat-noarr.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-59-56-845.csv Completed graceful shutdown