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_No_Goto.epf -i /storage/chc-comp/eldarica-misc/LIA/llreve/bug15_safe.c-1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 10:59:26,237 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 10:59:26,239 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 10:59:26,252 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 10:59:26,253 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 10:59:26,254 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 10:59:26,255 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 10:59:26,258 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 10:59:26,260 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 10:59:26,262 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 10:59:26,262 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 10:59:26,263 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 10:59:26,263 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 10:59:26,264 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 10:59:26,267 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 10:59:26,268 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 10:59:26,270 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 10:59:26,279 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 10:59:26,280 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 10:59:26,281 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 10:59:26,282 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 10:59:26,287 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 10:59:26,287 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 10:59:26,287 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 10:59:26,288 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 10:59:26,288 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 10:59:26,292 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 10:59:26,292 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 10:59:26,293 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 10:59:26,293 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 10:59:26,294 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 10:59:26,294 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 10:59:26,295 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 10:59:26,299 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 10:59:26,300 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 10:59:26,300 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 10:59:26,319 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 10:59:26,320 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 10:59:26,320 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 10:59:26,320 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 10:59:26,321 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 10:59:26,321 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 10:59:26,322 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 10:59:26,322 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 10:59:26,322 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 10:59:26,322 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 10:59:26,322 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 10:59:26,323 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 10:59:26,323 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 10:59:26,323 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 10:59:26,323 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 10:59:26,323 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 10:59:26,323 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 10:59:26,324 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 10:59:26,326 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 10:59:26,328 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 10:59:26,328 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 10:59:26,377 INFO ]: Repository-Root is: /tmp [2018-06-22 10:59:26,393 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 10:59:26,397 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 10:59:26,398 INFO ]: Initializing SmtParser... [2018-06-22 10:59:26,398 INFO ]: SmtParser initialized [2018-06-22 10:59:26,399 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/llreve/bug15_safe.c-1.smt2 [2018-06-22 10:59:26,400 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 10:59:26,482 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/bug15_safe.c-1.smt2 unknown [2018-06-22 10:59:26,672 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/bug15_safe.c-1.smt2 [2018-06-22 10:59:26,676 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 10:59:26,682 INFO ]: Walking toolchain with 4 elements. [2018-06-22 10:59:26,682 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 10:59:26,683 INFO ]: Initializing ChcToBoogie... [2018-06-22 10:59:26,683 INFO ]: ChcToBoogie initialized [2018-06-22 10:59:26,688 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 10:59:26" (1/1) ... [2018-06-22 10:59:26,736 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:59:26 Unit [2018-06-22 10:59:26,736 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 10:59:26,737 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 10:59:26,737 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 10:59:26,737 INFO ]: Boogie Preprocessor initialized [2018-06-22 10:59:26,759 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:59:26" (1/1) ... [2018-06-22 10:59:26,759 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:59:26" (1/1) ... [2018-06-22 10:59:26,765 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:59:26" (1/1) ... [2018-06-22 10:59:26,766 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:59:26" (1/1) ... [2018-06-22 10:59:26,771 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:59:26" (1/1) ... [2018-06-22 10:59:26,773 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:59:26" (1/1) ... [2018-06-22 10:59:26,774 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:59:26" (1/1) ... [2018-06-22 10:59:26,775 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 10:59:26,776 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 10:59:26,776 INFO ]: Initializing RCFGBuilder... [2018-06-22 10:59:26,776 INFO ]: RCFGBuilder initialized [2018-06-22 10:59:26,779 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:59:26" (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 10:59:26,791 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 10:59:26,791 INFO ]: Found specification of procedure False [2018-06-22 10:59:26,792 INFO ]: Found implementation of procedure False [2018-06-22 10:59:26,792 INFO ]: Specification and implementation of procedure inv_main21 given in one single declaration [2018-06-22 10:59:26,792 INFO ]: Found specification of procedure inv_main21 [2018-06-22 10:59:26,792 INFO ]: Found implementation of procedure inv_main21 [2018-06-22 10:59:26,792 INFO ]: Specification and implementation of procedure inv_main17 given in one single declaration [2018-06-22 10:59:26,792 INFO ]: Found specification of procedure inv_main17 [2018-06-22 10:59:26,792 INFO ]: Found implementation of procedure inv_main17 [2018-06-22 10:59:26,792 INFO ]: Specification and implementation of procedure inv_main8 given in one single declaration [2018-06-22 10:59:26,792 INFO ]: Found specification of procedure inv_main8 [2018-06-22 10:59:26,792 INFO ]: Found implementation of procedure inv_main8 [2018-06-22 10:59:26,792 INFO ]: Specification and implementation of procedure inv_main3 given in one single declaration [2018-06-22 10:59:26,792 INFO ]: Found specification of procedure inv_main3 [2018-06-22 10:59:26,792 INFO ]: Found implementation of procedure inv_main3 [2018-06-22 10:59:26,792 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 10:59:26,792 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 10:59:26,792 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 10:59:27,101 INFO ]: Using library mode [2018-06-22 10:59:27,101 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 10:59:27 BoogieIcfgContainer [2018-06-22 10:59:27,101 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 10:59:27,103 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 10:59:27,103 INFO ]: Initializing TraceAbstraction... [2018-06-22 10:59:27,106 INFO ]: TraceAbstraction initialized [2018-06-22 10:59:27,106 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 10:59:26" (1/3) ... [2018-06-22 10:59:27,107 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27435a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 10:59:27, skipping insertion in model container [2018-06-22 10:59:27,107 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 10:59:26" (2/3) ... [2018-06-22 10:59:27,107 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27435a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 10:59:27, skipping insertion in model container [2018-06-22 10:59:27,107 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 10:59:27" (3/3) ... [2018-06-22 10:59:27,109 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 10:59:27,119 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 10:59:27,131 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 10:59:27,183 INFO ]: Using default assertion order modulation [2018-06-22 10:59:27,184 INFO ]: Interprodecural is true [2018-06-22 10:59:27,184 INFO ]: Hoare is false [2018-06-22 10:59:27,184 INFO ]: Compute interpolants for FPandBP [2018-06-22 10:59:27,184 INFO ]: Backedges is TWOTRACK [2018-06-22 10:59:27,184 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 10:59:27,184 INFO ]: Difference is false [2018-06-22 10:59:27,184 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 10:59:27,184 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 10:59:27,206 INFO ]: Start isEmpty. Operand 26 states. [2018-06-22 10:59:27,222 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 10:59:27,222 INFO ]: Found error trace [2018-06-22 10:59:27,223 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 10:59:27,223 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 10:59:27,228 INFO ]: Analyzing trace with hash 384347857, now seen corresponding path program 1 times [2018-06-22 10:59:27,230 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 10:59:27,230 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 10:59:27,275 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:27,275 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 10:59:27,275 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:27,315 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:59:27,404 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 10:59:27,406 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 10:59:27,406 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 10:59:27,408 INFO ]: Interpolant automaton has 4 states [2018-06-22 10:59:27,421 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 10:59:27,421 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 10:59:27,423 INFO ]: Start difference. First operand 26 states. Second operand 4 states. [2018-06-22 10:59:27,480 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 10:59:27,480 INFO ]: Finished difference Result 26 states and 29 transitions. [2018-06-22 10:59:27,481 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 10:59:27,482 INFO ]: Start accepts. Automaton has 4 states. Word has length 21 [2018-06-22 10:59:27,482 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 10:59:27,491 INFO ]: With dead ends: 26 [2018-06-22 10:59:27,491 INFO ]: Without dead ends: 26 [2018-06-22 10:59:27,493 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 10:59:27,506 INFO ]: Start minimizeSevpa. Operand 26 states. [2018-06-22 10:59:27,527 INFO ]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-06-22 10:59:27,528 INFO ]: Start removeUnreachable. Operand 26 states. [2018-06-22 10:59:27,530 INFO ]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-06-22 10:59:27,531 INFO ]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2018-06-22 10:59:27,531 INFO ]: Finished accepts. word is rejected. [2018-06-22 10:59:27,531 INFO ]: Abstraction has 26 states and 29 transitions. [2018-06-22 10:59:27,531 INFO ]: Interpolant automaton has 4 states. [2018-06-22 10:59:27,531 INFO ]: Start isEmpty. Operand 26 states and 29 transitions. [2018-06-22 10:59:27,533 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 10:59:27,533 INFO ]: Found error trace [2018-06-22 10:59:27,533 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 10:59:27,533 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 10:59:27,533 INFO ]: Analyzing trace with hash 878207542, now seen corresponding path program 1 times [2018-06-22 10:59:27,533 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 10:59:27,533 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 10:59:27,534 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:27,534 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 10:59:27,534 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:27,544 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:59:27,637 INFO ]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 10:59:27,637 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 10:59:27,637 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 10:59:27,642 INFO ]: Interpolant automaton has 4 states [2018-06-22 10:59:27,642 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 10:59:27,642 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 10:59:27,642 INFO ]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2018-06-22 10:59:27,673 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 10:59:27,673 INFO ]: Finished difference Result 28 states and 31 transitions. [2018-06-22 10:59:27,674 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 10:59:27,674 INFO ]: Start accepts. Automaton has 4 states. Word has length 25 [2018-06-22 10:59:27,674 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 10:59:27,675 INFO ]: With dead ends: 28 [2018-06-22 10:59:27,675 INFO ]: Without dead ends: 28 [2018-06-22 10:59:27,676 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 10:59:27,676 INFO ]: Start minimizeSevpa. Operand 28 states. [2018-06-22 10:59:27,680 INFO ]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-06-22 10:59:27,680 INFO ]: Start removeUnreachable. Operand 28 states. [2018-06-22 10:59:27,681 INFO ]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-06-22 10:59:27,681 INFO ]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2018-06-22 10:59:27,681 INFO ]: Finished accepts. word is rejected. [2018-06-22 10:59:27,681 INFO ]: Abstraction has 28 states and 31 transitions. [2018-06-22 10:59:27,681 INFO ]: Interpolant automaton has 4 states. [2018-06-22 10:59:27,681 INFO ]: Start isEmpty. Operand 28 states and 31 transitions. [2018-06-22 10:59:27,683 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 10:59:27,683 INFO ]: Found error trace [2018-06-22 10:59:27,683 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 10:59:27,683 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 10:59:27,683 INFO ]: Analyzing trace with hash 172381115, now seen corresponding path program 1 times [2018-06-22 10:59:27,683 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 10:59:27,683 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 10:59:27,684 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:27,684 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 10:59:27,684 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:27,712 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:59:27,861 INFO ]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 10:59:27,861 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 10:59:27,861 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) [2018-06-22 10:59:27,873 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 10:59:27,908 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:59:27,915 INFO ]: Computing forward predicates... [2018-06-22 10:59:28,169 INFO ]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 10:59:28,200 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 10:59:28,201 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 10:59:28,201 INFO ]: Interpolant automaton has 6 states [2018-06-22 10:59:28,201 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 10:59:28,201 INFO ]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-22 10:59:28,201 INFO ]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2018-06-22 10:59:28,524 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 10:59:28,524 INFO ]: Finished difference Result 30 states and 33 transitions. [2018-06-22 10:59:28,524 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 10:59:28,524 INFO ]: Start accepts. Automaton has 6 states. Word has length 29 [2018-06-22 10:59:28,525 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 10:59:28,526 INFO ]: With dead ends: 30 [2018-06-22 10:59:28,526 INFO ]: Without dead ends: 30 [2018-06-22 10:59:28,526 INFO ]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 10:59:28,526 INFO ]: Start minimizeSevpa. Operand 30 states. [2018-06-22 10:59:28,531 INFO ]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-06-22 10:59:28,531 INFO ]: Start removeUnreachable. Operand 30 states. [2018-06-22 10:59:28,532 INFO ]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2018-06-22 10:59:28,532 INFO ]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 29 [2018-06-22 10:59:28,532 INFO ]: Finished accepts. word is rejected. [2018-06-22 10:59:28,532 INFO ]: Abstraction has 30 states and 33 transitions. [2018-06-22 10:59:28,532 INFO ]: Interpolant automaton has 6 states. [2018-06-22 10:59:28,532 INFO ]: Start isEmpty. Operand 30 states and 33 transitions. [2018-06-22 10:59:28,533 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 10:59:28,534 INFO ]: Found error trace [2018-06-22 10:59:28,534 INFO ]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 10:59:28,534 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 10:59:28,534 INFO ]: Analyzing trace with hash 880294560, now seen corresponding path program 2 times [2018-06-22 10:59:28,534 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 10:59:28,534 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 10:59:28,535 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:28,535 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 10:59:28,535 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:28,549 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:59:28,631 INFO ]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 10:59:28,632 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 10:59:28,632 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 10:59:28,646 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 10:59:28,710 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 10:59:28,710 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:59:28,714 INFO ]: Computing forward predicates... [2018-06-22 10:59:28,901 INFO ]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 10:59:28,933 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 10:59:28,933 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 10:59:28,933 INFO ]: Interpolant automaton has 6 states [2018-06-22 10:59:28,933 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 10:59:28,934 INFO ]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-22 10:59:28,934 INFO ]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2018-06-22 10:59:29,020 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 10:59:29,020 INFO ]: Finished difference Result 32 states and 35 transitions. [2018-06-22 10:59:29,020 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 10:59:29,020 INFO ]: Start accepts. Automaton has 6 states. Word has length 33 [2018-06-22 10:59:29,021 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 10:59:29,022 INFO ]: With dead ends: 32 [2018-06-22 10:59:29,022 INFO ]: Without dead ends: 32 [2018-06-22 10:59:29,022 INFO ]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-06-22 10:59:29,022 INFO ]: Start minimizeSevpa. Operand 32 states. [2018-06-22 10:59:29,028 INFO ]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-06-22 10:59:29,028 INFO ]: Start removeUnreachable. Operand 32 states. [2018-06-22 10:59:29,029 INFO ]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2018-06-22 10:59:29,029 INFO ]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 33 [2018-06-22 10:59:29,029 INFO ]: Finished accepts. word is rejected. [2018-06-22 10:59:29,029 INFO ]: Abstraction has 32 states and 35 transitions. [2018-06-22 10:59:29,029 INFO ]: Interpolant automaton has 6 states. [2018-06-22 10:59:29,029 INFO ]: Start isEmpty. Operand 32 states and 35 transitions. [2018-06-22 10:59:29,030 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 10:59:29,030 INFO ]: Found error trace [2018-06-22 10:59:29,030 INFO ]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 10:59:29,031 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 10:59:29,031 INFO ]: Analyzing trace with hash -1056865243, now seen corresponding path program 3 times [2018-06-22 10:59:29,031 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 10:59:29,031 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 10:59:29,032 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:29,032 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 10:59:29,032 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:29,052 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:59:29,715 INFO ]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 10:59:29,716 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 10:59:29,733 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 10:59:29,740 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 10:59:29,782 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 10:59:29,782 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:59:29,786 INFO ]: Computing forward predicates... [2018-06-22 10:59:30,391 WARN ]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-06-22 10:59:30,464 INFO ]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 10:59:30,491 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 10:59:30,492 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2018-06-22 10:59:30,492 INFO ]: Interpolant automaton has 18 states [2018-06-22 10:59:30,492 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 10:59:30,492 INFO ]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2018-06-22 10:59:30,492 INFO ]: Start difference. First operand 32 states and 35 transitions. Second operand 18 states. [2018-06-22 10:59:30,923 WARN ]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-06-22 10:59:31,031 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 10:59:31,032 INFO ]: Finished difference Result 42 states and 46 transitions. [2018-06-22 10:59:31,033 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 10:59:31,033 INFO ]: Start accepts. Automaton has 18 states. Word has length 37 [2018-06-22 10:59:31,033 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 10:59:31,034 INFO ]: With dead ends: 42 [2018-06-22 10:59:31,034 INFO ]: Without dead ends: 40 [2018-06-22 10:59:31,035 INFO ]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2018-06-22 10:59:31,035 INFO ]: Start minimizeSevpa. Operand 40 states. [2018-06-22 10:59:31,041 INFO ]: Finished minimizeSevpa. Reduced states from 40 to 36. [2018-06-22 10:59:31,041 INFO ]: Start removeUnreachable. Operand 36 states. [2018-06-22 10:59:31,041 INFO ]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-06-22 10:59:31,041 INFO ]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 37 [2018-06-22 10:59:31,042 INFO ]: Finished accepts. word is rejected. [2018-06-22 10:59:31,042 INFO ]: Abstraction has 36 states and 40 transitions. [2018-06-22 10:59:31,042 INFO ]: Interpolant automaton has 18 states. [2018-06-22 10:59:31,042 INFO ]: Start isEmpty. Operand 36 states and 40 transitions. [2018-06-22 10:59:31,042 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 10:59:31,042 INFO ]: Found error trace [2018-06-22 10:59:31,043 INFO ]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 10:59:31,043 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 10:59:31,043 INFO ]: Analyzing trace with hash -40190326, now seen corresponding path program 4 times [2018-06-22 10:59:31,043 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 10:59:31,043 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 10:59:31,044 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:31,044 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 10:59:31,044 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:31,058 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:59:31,127 INFO ]: Checked inductivity of 31 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-06-22 10:59:31,128 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 10:59:31,128 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 10:59:31,146 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 10:59:31,169 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 10:59:31,169 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:59:31,171 INFO ]: Computing forward predicates... [2018-06-22 10:59:31,196 INFO ]: Checked inductivity of 31 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-06-22 10:59:31,216 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 10:59:31,216 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-06-22 10:59:31,216 INFO ]: Interpolant automaton has 7 states [2018-06-22 10:59:31,216 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 10:59:31,217 INFO ]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-06-22 10:59:31,217 INFO ]: Start difference. First operand 36 states and 40 transitions. Second operand 7 states. [2018-06-22 10:59:31,385 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 10:59:31,385 INFO ]: Finished difference Result 40 states and 42 transitions. [2018-06-22 10:59:31,385 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 10:59:31,385 INFO ]: Start accepts. Automaton has 7 states. Word has length 41 [2018-06-22 10:59:31,386 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 10:59:31,386 INFO ]: With dead ends: 40 [2018-06-22 10:59:31,386 INFO ]: Without dead ends: 34 [2018-06-22 10:59:31,387 INFO ]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-06-22 10:59:31,387 INFO ]: Start minimizeSevpa. Operand 34 states. [2018-06-22 10:59:31,390 INFO ]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-06-22 10:59:31,390 INFO ]: Start removeUnreachable. Operand 34 states. [2018-06-22 10:59:31,391 INFO ]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-06-22 10:59:31,391 INFO ]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 41 [2018-06-22 10:59:31,392 INFO ]: Finished accepts. word is rejected. [2018-06-22 10:59:31,392 INFO ]: Abstraction has 34 states and 36 transitions. [2018-06-22 10:59:31,392 INFO ]: Interpolant automaton has 7 states. [2018-06-22 10:59:31,392 INFO ]: Start isEmpty. Operand 34 states and 36 transitions. [2018-06-22 10:59:31,393 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 10:59:31,393 INFO ]: Found error trace [2018-06-22 10:59:31,393 INFO ]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 10:59:31,393 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 10:59:31,393 INFO ]: Analyzing trace with hash -414056470, now seen corresponding path program 5 times [2018-06-22 10:59:31,393 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 10:59:31,393 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 10:59:31,394 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:31,394 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 10:59:31,394 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 10:59:31,405 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:59:31,482 INFO ]: Checked inductivity of 31 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-06-22 10:59:31,482 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 10:59:31,482 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 10:59:31,488 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 10:59:31,516 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 10:59:31,516 INFO ]: Conjunction of SSA is unsat [2018-06-22 10:59:31,519 INFO ]: Computing forward predicates... [2018-06-22 10:59:31,563 INFO ]: Checked inductivity of 31 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-06-22 10:59:31,587 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 10:59:31,587 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-06-22 10:59:31,587 INFO ]: Interpolant automaton has 7 states [2018-06-22 10:59:31,587 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 10:59:31,587 INFO ]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-06-22 10:59:31,587 INFO ]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2018-06-22 10:59:31,645 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 10:59:31,645 INFO ]: Finished difference Result 20 states and 21 transitions. [2018-06-22 10:59:31,645 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 10:59:31,646 INFO ]: Start accepts. Automaton has 7 states. Word has length 41 [2018-06-22 10:59:31,646 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 10:59:31,646 INFO ]: With dead ends: 20 [2018-06-22 10:59:31,646 INFO ]: Without dead ends: 0 [2018-06-22 10:59:31,646 INFO ]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-06-22 10:59:31,646 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 10:59:31,646 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 10:59:31,646 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 10:59:31,646 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 10:59:31,646 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2018-06-22 10:59:31,646 INFO ]: Finished accepts. word is rejected. [2018-06-22 10:59:31,646 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 10:59:31,647 INFO ]: Interpolant automaton has 7 states. [2018-06-22 10:59:31,647 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 10:59:31,647 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 10:59:31,651 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 10:59:31 BoogieIcfgContainer [2018-06-22 10:59:31,652 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 10:59:31,652 INFO ]: Toolchain (without parser) took 4975.67 ms. Allocated memory was 308.3 MB in the beginning and 337.6 MB in the end (delta: 29.4 MB). Free memory was 264.7 MB in the beginning and 261.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 32.4 MB. Max. memory is 3.6 GB. [2018-06-22 10:59:31,653 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 10:59:31,654 INFO ]: ChcToBoogie took 54.08 ms. Allocated memory is still 308.3 MB. Free memory was 264.7 MB in the beginning and 262.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 10:59:31,654 INFO ]: Boogie Preprocessor took 38.34 ms. Allocated memory is still 308.3 MB. Free memory was 262.7 MB in the beginning and 260.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 10:59:31,655 INFO ]: RCFGBuilder took 325.53 ms. Allocated memory is still 308.3 MB. Free memory was 260.7 MB in the beginning and 253.7 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-22 10:59:31,655 INFO ]: TraceAbstraction took 4548.81 ms. Allocated memory was 308.3 MB in the beginning and 337.6 MB in the end (delta: 29.4 MB). Free memory was 252.7 MB in the beginning and 261.6 MB in the end (delta: -8.9 MB). Peak memory consumption was 20.4 MB. Max. memory is 3.6 GB. [2018-06-22 10:59:31,658 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 54.08 ms. Allocated memory is still 308.3 MB. Free memory was 264.7 MB in the beginning and 262.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 38.34 ms. Allocated memory is still 308.3 MB. Free memory was 262.7 MB in the beginning and 260.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 325.53 ms. Allocated memory is still 308.3 MB. Free memory was 260.7 MB in the beginning and 253.7 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 4548.81 ms. Allocated memory was 308.3 MB in the beginning and 337.6 MB in the end (delta: 29.4 MB). Free memory was 252.7 MB in the beginning and 261.6 MB in the end (delta: -8.9 MB). Peak memory consumption was 20.4 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 26 locations, 1 error locations. SAFE Result, 4.4s OverallTime, 7 OverallIterations, 4 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 175 SDtfs, 24 SDslu, 668 SDs, 0 SdLazy, 287 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 173 SyntacticMatches, 17 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, 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, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 408 NumberOfCodeBlocks, 408 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 396 ConstructedInterpolants, 8 QuantifiedInterpolants, 41528 SizeOfPredicates, 18 NumberOfNonLiveVariables, 693 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 165/205 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bug15_safe.c-1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_10-59-31-673.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bug15_safe.c-1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_10-59-31-673.csv Received shutdown request...