java -Xss4m -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 0.1.23-14921ce [2018-06-25 13:35:34,205 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:35:34,212 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:35:34,229 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:35:34,229 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:35:34,230 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:35:34,231 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:35:34,235 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:35:34,237 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:35:34,238 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:35:34,240 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:35:34,240 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:35:34,241 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:35:34,242 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:35:34,243 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:35:34,247 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:35:34,248 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:35:34,261 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:35:34,263 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:35:34,264 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:35:34,265 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:35:34,267 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:35:34,268 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:35:34,268 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:35:34,273 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:35:34,274 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:35:34,275 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:35:34,275 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:35:34,276 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:35:34,277 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:35:34,283 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:35:34,284 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:35:34,284 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:35:34,284 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:35:34,285 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:35:34,285 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:35:34,310 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:35:34,310 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:35:34,310 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:35:34,310 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:35:34,314 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:35:34,314 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:35:34,314 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:35:34,314 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:35:34,315 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:35:34,315 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:35:34,315 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:35:34,315 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:35:34,315 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:35:34,316 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:35:34,316 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:35:34,316 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:35:34,316 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:35:34,316 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:35:34,317 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:35:34,320 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:35:34,320 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:35:34,321 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:35:34,322 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:35:34,373 INFO ]: Repository-Root is: /tmp [2018-06-25 13:35:34,387 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:35:34,392 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:35:34,394 INFO ]: Initializing SmtParser... [2018-06-25 13:35:34,394 INFO ]: SmtParser initialized [2018-06-25 13:35:34,395 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/string_concat-noarr.c.smt2 [2018-06-25 13:35:34,396 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 [2018-06-25 13:35:34,484 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/string_concat-noarr.c.smt2 unknown [2018-06-25 13:35:34,707 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/string_concat-noarr.c.smt2 [2018-06-25 13:35:34,711 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:35:34,718 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:35:34,718 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:35:34,718 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:35:34,718 INFO ]: ChcToBoogie initialized [2018-06-25 13:35:34,721 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:35:34" (1/1) ... [2018-06-25 13:35:34,776 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:35:34 Unit [2018-06-25 13:35:34,776 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:35:34,777 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:35:34,777 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:35:34,777 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:35:34,797 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:35:34" (1/1) ... [2018-06-25 13:35:34,798 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:35:34" (1/1) ... [2018-06-25 13:35:34,804 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:35:34" (1/1) ... [2018-06-25 13:35:34,804 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:35:34" (1/1) ... [2018-06-25 13:35:34,816 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:35:34" (1/1) ... [2018-06-25 13:35:34,818 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:35:34" (1/1) ... [2018-06-25 13:35:34,819 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:35:34" (1/1) ... [2018-06-25 13:35:34,820 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:35:34,830 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:35:34,830 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:35:34,830 INFO ]: RCFGBuilder initialized [2018-06-25 13:35:34,831 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:35:34" (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) [2018-06-25 13:35:34,849 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:35:34,849 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:35:34,849 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:35:34,849 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:35:34,849 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:35:34,849 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 [2018-06-25 13:35:35,066 INFO ]: Using library mode [2018-06-25 13:35:35,066 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:35:35 BoogieIcfgContainer [2018-06-25 13:35:35,066 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:35:35,077 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:35:35,077 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:35:35,080 INFO ]: TraceAbstraction initialized [2018-06-25 13:35:35,080 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:35:34" (1/3) ... [2018-06-25 13:35:35,081 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619a8e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:35:35, skipping insertion in model container [2018-06-25 13:35:35,081 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:35:34" (2/3) ... [2018-06-25 13:35:35,081 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619a8e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:35:35, skipping insertion in model container [2018-06-25 13:35:35,081 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:35:35" (3/3) ... [2018-06-25 13:35:35,083 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:35:35,102 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:35:35,120 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:35:35,201 INFO ]: Using default assertion order modulation [2018-06-25 13:35:35,201 INFO ]: Interprodecural is true [2018-06-25 13:35:35,202 INFO ]: Hoare is false [2018-06-25 13:35:35,202 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:35:35,202 INFO ]: Backedges is TWOTRACK [2018-06-25 13:35:35,202 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:35:35,202 INFO ]: Difference is false [2018-06-25 13:35:35,202 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:35:35,202 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:35:35,219 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:35:35,236 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:35:35,237 INFO ]: Found error trace [2018-06-25 13:35:35,239 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:35:35,239 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:35:35,244 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:35:35,247 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:35:35,248 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:35:35,294 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:35,295 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:35:35,295 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:35,344 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:35,402 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:35,403 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:35:35,404 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:35:35,405 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:35:35,417 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:35:35,417 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:35:35,419 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:35:35,476 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:35:35,476 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:35:35,476 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:35:35,478 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:35:35,478 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:35:35,486 INFO ]: With dead ends: 9 [2018-06-25 13:35:35,486 INFO ]: Without dead ends: 9 [2018-06-25 13:35:35,488 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 [2018-06-25 13:35:35,502 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:35:35,516 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:35:35,517 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:35:35,518 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:35:35,519 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:35:35,519 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:35:35,519 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:35:35,519 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:35:35,519 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:35:35,519 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:35:35,519 INFO ]: Found error trace [2018-06-25 13:35:35,519 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:35:35,520 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:35:35,520 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:35:35,520 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:35:35,520 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:35:35,521 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:35,521 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:35:35,521 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:35,554 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:35,671 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:35,671 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:35:35,671 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 [2018-06-25 13:35:35,684 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:35:35,739 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:35,748 INFO ]: Computing forward predicates... [2018-06-25 13:35:36,082 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:36,102 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:35:36,102 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:35:36,103 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:35:36,103 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:35:36,103 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:35:36,103 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:35:36,271 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:35:36,271 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:35:36,272 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:35:36,272 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:35:36,272 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:35:36,272 INFO ]: With dead ends: 10 [2018-06-25 13:35:36,272 INFO ]: Without dead ends: 10 [2018-06-25 13:35:36,273 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 [2018-06-25 13:35:36,273 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:35:36,274 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:35:36,274 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:35:36,275 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:35:36,275 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:35:36,275 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:35:36,275 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:35:36,275 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:35:36,275 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:35:36,275 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:35:36,275 INFO ]: Found error trace [2018-06-25 13:35:36,275 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:35:36,275 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:35:36,275 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 13:35:36,276 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:35:36,276 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:35:36,278 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:36,278 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:35:36,278 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:36,313 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:36,652 WARN ]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 13:35:36,653 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:36,653 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:35:36,653 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 [2018-06-25 13:35:36,662 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:35:36,712 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:35:36,712 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:36,714 INFO ]: Computing forward predicates... [2018-06-25 13:35:37,108 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:37,141 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:35:37,141 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 13:35:37,142 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:35:37,142 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:35:37,142 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:35:37,142 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 13:35:37,621 WARN ]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-25 13:35:37,629 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:35:37,629 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:35:37,630 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:35:37,630 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 13:35:37,630 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:35:37,630 INFO ]: With dead ends: 11 [2018-06-25 13:35:37,630 INFO ]: Without dead ends: 11 [2018-06-25 13:35:37,630 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:35:37,631 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:35:37,632 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:35:37,632 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:35:37,632 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:35:37,632 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:35:37,632 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:35:37,632 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:35:37,632 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:35:37,632 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:35:37,632 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:35:37,632 INFO ]: Found error trace [2018-06-25 13:35:37,633 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:35:37,633 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:35:37,633 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-25 13:35:37,633 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:35:37,633 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:35:37,634 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:37,634 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:35:37,634 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:37,691 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:37,988 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:37,988 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:35:37,988 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 [2018-06-25 13:35:37,999 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:35:38,080 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:35:38,080 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:38,084 INFO ]: Computing forward predicates... [2018-06-25 13:35:39,943 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:39,975 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:35:39,976 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 13:35:39,976 INFO ]: Interpolant automaton has 7 states [2018-06-25 13:35:39,976 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 13:35:39,976 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-25 13:35:39,976 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-25 13:35:40,548 WARN ]: Spent 508.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-06-25 13:35:41,982 WARN ]: Spent 1.34 s on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2018-06-25 13:35:42,233 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:35:42,233 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 13:35:42,233 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 13:35:42,233 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-25 13:35:42,233 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:35:42,233 INFO ]: With dead ends: 12 [2018-06-25 13:35:42,233 INFO ]: Without dead ends: 12 [2018-06-25 13:35:42,234 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-06-25 13:35:42,234 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 13:35:42,235 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 13:35:42,235 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 13:35:42,236 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 13:35:42,236 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 13:35:42,236 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:35:42,236 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 13:35:42,236 INFO ]: Interpolant automaton has 7 states. [2018-06-25 13:35:42,236 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 13:35:42,236 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 13:35:42,236 INFO ]: Found error trace [2018-06-25 13:35:42,236 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:35:42,236 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:35:42,237 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-25 13:35:42,237 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:35:42,237 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:35:42,237 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:42,237 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:35:42,237 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:42,267 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:42,487 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:42,487 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:35:42,487 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 [2018-06-25 13:35:42,493 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:35:42,520 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:35:42,520 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:42,523 INFO ]: Computing forward predicates... [2018-06-25 13:35:45,785 WARN ]: Spent 227.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 15 [2018-06-25 13:35:47,670 WARN ]: Spent 871.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 10 [2018-06-25 13:35:48,071 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:48,091 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:35:48,091 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-06-25 13:35:48,091 INFO ]: Interpolant automaton has 11 states [2018-06-25 13:35:48,091 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-25 13:35:48,092 INFO ]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-06-25 13:35:48,092 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-06-25 13:35:48,355 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2018-06-25 13:35:48,425 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:35:48,425 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:35:48,425 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:35:48,425 INFO ]: Start accepts. Automaton has 11 states. Word has length 11 [2018-06-25 13:35:48,425 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:35:48,425 INFO ]: With dead ends: 13 [2018-06-25 13:35:48,425 INFO ]: Without dead ends: 13 [2018-06-25 13:35:48,426 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2018-06-25 13:35:48,426 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:35:48,427 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:35:48,427 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:35:48,427 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:35:48,428 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 13:35:48,428 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:35:48,430 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:35:48,430 INFO ]: Interpolant automaton has 11 states. [2018-06-25 13:35:48,430 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:35:48,430 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:35:48,430 INFO ]: Found error trace [2018-06-25 13:35:48,430 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:35:48,430 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:35:48,430 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-25 13:35:48,430 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:35:48,430 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:35:48,431 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:48,431 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:35:48,431 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:48,470 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:49,180 WARN ]: Spent 492.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-06-25 13:35:49,313 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:49,314 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:35:49,314 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 [2018-06-25 13:35:49,321 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 13:35:49,353 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-25 13:35:49,353 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:49,356 INFO ]: Computing forward predicates... [2018-06-25 13:35:52,256 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:52,277 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:35:52,277 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-25 13:35:52,277 INFO ]: Interpolant automaton has 10 states [2018-06-25 13:35:52,277 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 13:35:52,278 INFO ]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-06-25 13:35:52,278 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-06-25 13:35:52,519 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:35:52,519 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-25 13:35:52,519 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 13:35:52,519 INFO ]: Start accepts. Automaton has 10 states. Word has length 12 [2018-06-25 13:35:52,519 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:35:52,520 INFO ]: With dead ends: 14 [2018-06-25 13:35:52,520 INFO ]: Without dead ends: 14 [2018-06-25 13:35:52,520 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2018-06-25 13:35:52,520 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-25 13:35:52,522 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-25 13:35:52,522 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-25 13:35:52,522 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-25 13:35:52,522 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-25 13:35:52,522 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:35:52,522 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-25 13:35:52,522 INFO ]: Interpolant automaton has 10 states. [2018-06-25 13:35:52,522 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-25 13:35:52,523 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-25 13:35:52,524 INFO ]: Found error trace [2018-06-25 13:35:52,524 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:35:52,524 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:35:52,524 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-25 13:35:52,524 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:35:52,524 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:35:52,524 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:52,524 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:35:52,524 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:35:52,601 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:52,949 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:35:52,949 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:35:52,967 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 [2018-06-25 13:35:52,979 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-25 13:35:53,020 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-25 13:35:53,020 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:35:53,024 INFO ]: Computing forward predicates... [2018-06-25 13:35:53,799 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:35:53,809 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:35:53,849 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:35:53,890 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 13:35:54,057 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:35:54,062 WARN ]: expecting exponential blowup for input size 8 [2018-06-25 13:36:13,872 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-25 13:36:40,454 INFO ]: Timeout while computing interpolants [2018-06-25 13:36:40,656 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:36:40,656 WARN ]: Verification canceled [2018-06-25 13:36:40,660 WARN ]: Timeout [2018-06-25 13:36:40,660 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:36:40 BoogieIcfgContainer [2018-06-25 13:36:40,660 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:36:40,662 INFO ]: Toolchain (without parser) took 65949.37 ms. Allocated memory was 303.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 257.9 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-25 13:36:40,663 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 303.6 MB. Free memory is still 268.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:36:40,663 INFO ]: ChcToBoogie took 58.45 ms. Allocated memory is still 303.6 MB. Free memory was 255.9 MB in the beginning and 253.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:36:40,664 INFO ]: Boogie Preprocessor took 43.46 ms. Allocated memory is still 303.6 MB. Free memory is still 253.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:36:40,664 INFO ]: RCFGBuilder took 236.50 ms. Allocated memory is still 303.6 MB. Free memory was 253.9 MB in the beginning and 244.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:36:40,664 INFO ]: TraceAbstraction took 65583.53 ms. Allocated memory was 303.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 244.0 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-25 13:36:40,671 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 303.6 MB. Free memory is still 268.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.45 ms. Allocated memory is still 303.6 MB. Free memory was 255.9 MB in the beginning and 253.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 43.46 ms. Allocated memory is still 303.6 MB. Free memory is still 253.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 236.50 ms. Allocated memory is still 303.6 MB. Free memory was 253.9 MB in the beginning and 244.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 65583.53 ms. Allocated memory was 303.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 244.0 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 14 with TraceHistMax 6, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 47588 quantified variables from 14 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 65.4s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 3.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 14 SDslu, 105 SDs, 0 SdLazy, 43 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 0.4s SatisfiabilityAnalysisTime, 12.9s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 3784 SizeOfPredicates, 25 NumberOfNonLiveVariables, 675 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 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-0-2018-06-25_13-36-40-689.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-0-2018-06-25_13-36-40-689.csv Completed graceful shutdown