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/vmt-chc-benchmarks/ctigar/xyz.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:49:36,587 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:49:36,589 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:49:36,601 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:49:36,601 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:49:36,602 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:49:36,603 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:49:36,605 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:49:36,606 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:49:36,607 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:49:36,608 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:49:36,608 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:49:36,609 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:49:36,610 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:49:36,611 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:49:36,611 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:49:36,613 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:49:36,619 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:49:36,621 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:49:36,622 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:49:36,630 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:49:36,633 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:49:36,633 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:49:36,633 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:49:36,634 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:49:36,635 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:49:36,635 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:49:36,636 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:49:36,637 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:49:36,637 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:49:36,638 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:49:36,638 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:49:36,639 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:49:36,639 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:49:36,640 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:49:36,640 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 15:49:36,653 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:49:36,653 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:49:36,653 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:49:36,653 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:49:36,654 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:49:36,654 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:49:36,654 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:49:36,655 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:49:36,655 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:49:36,655 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:49:36,655 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:49:36,655 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:49:36,656 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:49:36,656 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:49:36,656 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:49:36,656 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:49:36,656 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:49:36,656 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:49:36,658 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:49:36,659 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:49:36,659 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:49:36,708 INFO ]: Repository-Root is: /tmp [2018-06-22 15:49:36,726 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:49:36,733 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:49:36,735 INFO ]: Initializing SmtParser... [2018-06-22 15:49:36,735 INFO ]: SmtParser initialized [2018-06-22 15:49:36,736 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/xyz.c.smt2 [2018-06-22 15:49:36,738 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 15:49:36,831 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/xyz.c.smt2 unknown [2018-06-22 15:49:37,143 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/xyz.c.smt2 [2018-06-22 15:49:37,151 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:49:37,157 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:49:37,157 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:49:37,157 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:49:37,157 INFO ]: ChcToBoogie initialized [2018-06-22 15:49:37,161 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:49:37" (1/1) ... [2018-06-22 15:49:37,204 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:49:37 Unit [2018-06-22 15:49:37,205 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:49:37,208 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:49:37,208 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:49:37,208 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:49:37,230 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:49:37" (1/1) ... [2018-06-22 15:49:37,230 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:49:37" (1/1) ... [2018-06-22 15:49:37,239 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:49:37" (1/1) ... [2018-06-22 15:49:37,239 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:49:37" (1/1) ... [2018-06-22 15:49:37,245 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:49:37" (1/1) ... [2018-06-22 15:49:37,246 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:49:37" (1/1) ... [2018-06-22 15:49:37,257 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:49:37" (1/1) ... [2018-06-22 15:49:37,258 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:49:37,259 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:49:37,259 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:49:37,259 INFO ]: RCFGBuilder initialized [2018-06-22 15:49:37,260 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:49:37" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:49:37,270 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:49:37,271 INFO ]: Found specification of procedure False [2018-06-22 15:49:37,271 INFO ]: Found implementation of procedure False [2018-06-22 15:49:37,271 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:49:37,271 INFO ]: Found specification of procedure state [2018-06-22 15:49:37,271 INFO ]: Found implementation of procedure state [2018-06-22 15:49:37,271 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:49:37,271 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:49:37,271 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 15:49:37,504 INFO ]: Using library mode [2018-06-22 15:49:37,504 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:49:37 BoogieIcfgContainer [2018-06-22 15:49:37,505 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:49:37,515 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:49:37,515 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:49:37,518 INFO ]: TraceAbstraction initialized [2018-06-22 15:49:37,519 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:49:37" (1/3) ... [2018-06-22 15:49:37,519 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600a1e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:49:37, skipping insertion in model container [2018-06-22 15:49:37,519 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:49:37" (2/3) ... [2018-06-22 15:49:37,520 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600a1e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:49:37, skipping insertion in model container [2018-06-22 15:49:37,520 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:49:37" (3/3) ... [2018-06-22 15:49:37,522 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:49:37,539 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:49:37,550 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:49:37,598 INFO ]: Using default assertion order modulation [2018-06-22 15:49:37,598 INFO ]: Interprodecural is true [2018-06-22 15:49:37,598 INFO ]: Hoare is false [2018-06-22 15:49:37,598 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:49:37,598 INFO ]: Backedges is TWOTRACK [2018-06-22 15:49:37,598 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:49:37,598 INFO ]: Difference is false [2018-06-22 15:49:37,599 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:49:37,599 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:49:37,623 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:49:37,643 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:49:37,643 INFO ]: Found error trace [2018-06-22 15:49:37,644 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:49:37,644 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:49:37,650 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:49:37,652 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:49:37,652 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:49:37,689 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:37,689 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:49:37,689 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:37,714 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:37,807 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:49:37,809 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:49:37,810 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:49:37,812 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:49:37,825 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:49:37,825 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:49:37,827 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:49:37,906 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:49:37,906 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:49:37,906 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:49:37,908 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:49:37,908 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:49:37,918 INFO ]: With dead ends: 13 [2018-06-22 15:49:37,919 INFO ]: Without dead ends: 13 [2018-06-22 15:49:37,920 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 15:49:37,933 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:49:37,956 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:49:37,957 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:49:37,957 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:49:37,959 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:49:37,959 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:49:37,959 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:49:37,959 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:49:37,959 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:49:37,960 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:49:37,960 INFO ]: Found error trace [2018-06-22 15:49:37,960 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:49:37,960 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:49:37,960 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:49:37,961 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:49:37,961 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:49:37,961 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:37,961 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:49:37,961 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:38,011 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:38,164 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:49:38,164 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:49:38,164 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:49:38,176 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:49:38,218 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:38,227 INFO ]: Computing forward predicates... [2018-06-22 15:49:38,435 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:49:38,455 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:49:38,455 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:49:38,455 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:49:38,455 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:49:38,456 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:49:38,456 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:49:38,611 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:49:38,611 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:49:38,612 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:49:38,612 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:49:38,612 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:49:38,612 INFO ]: With dead ends: 15 [2018-06-22 15:49:38,612 INFO ]: Without dead ends: 15 [2018-06-22 15:49:38,613 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:49:38,613 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:49:38,617 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:49:38,617 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:49:38,618 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:49:38,618 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:49:38,618 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:49:38,618 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:49:38,618 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:49:38,618 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:49:38,619 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:49:38,619 INFO ]: Found error trace [2018-06-22 15:49:38,619 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:49:38,619 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:49:38,620 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:49:38,620 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:49:38,620 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:49:38,621 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:38,621 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:49:38,621 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:38,656 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:39,150 WARN ]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 15:49:39,317 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:49:39,317 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:49:39,317 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 15:49:39,338 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:49:39,423 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:49:39,424 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:39,427 INFO ]: Computing forward predicates... [2018-06-22 15:49:39,642 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:49:39,668 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:49:39,669 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-06-22 15:49:39,669 INFO ]: Interpolant automaton has 8 states [2018-06-22 15:49:39,669 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 15:49:39,669 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 15:49:39,669 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-06-22 15:49:40,269 WARN ]: Spent 294.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 18 [2018-06-22 15:49:40,300 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:49:40,300 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:49:40,300 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:49:40,300 INFO ]: Start accepts. Automaton has 8 states. Word has length 17 [2018-06-22 15:49:40,300 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:49:40,301 INFO ]: With dead ends: 17 [2018-06-22 15:49:40,301 INFO ]: Without dead ends: 17 [2018-06-22 15:49:40,301 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-22 15:49:40,301 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:49:40,304 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:49:40,304 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:49:40,305 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:49:40,305 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:49:40,305 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:49:40,305 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:49:40,305 INFO ]: Interpolant automaton has 8 states. [2018-06-22 15:49:40,305 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:49:40,306 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:49:40,306 INFO ]: Found error trace [2018-06-22 15:49:40,306 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:49:40,306 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:49:40,306 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:49:40,306 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:49:40,306 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:49:40,307 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:40,307 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:49:40,307 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:40,338 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:40,577 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:49:40,578 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:49:40,578 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 15:49:40,585 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:49:40,646 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:49:40,646 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:40,650 INFO ]: Computing forward predicates... [2018-06-22 15:49:40,842 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:49:40,875 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:49:40,875 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:49:40,876 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:49:40,876 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:49:40,876 INFO ]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:49:40,876 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:49:41,040 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-06-22 15:49:41,292 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:49:41,331 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:49:41,331 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:49:41,331 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:49:41,331 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:49:41,332 INFO ]: With dead ends: 19 [2018-06-22 15:49:41,332 INFO ]: Without dead ends: 19 [2018-06-22 15:49:41,332 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:49:41,333 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:49:41,336 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:49:41,336 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:49:41,337 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:49:41,337 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:49:41,337 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:49:41,337 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:49:41,337 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:49:41,337 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:49:41,337 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:49:41,337 INFO ]: Found error trace [2018-06-22 15:49:41,337 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:49:41,338 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:49:41,338 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:49:41,338 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:49:41,338 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:49:41,338 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:41,338 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:49:41,338 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:41,374 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:41,733 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:49:41,733 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:49:41,733 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 15:49:41,744 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:49:41,777 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:49:41,777 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:41,781 INFO ]: Computing forward predicates... [2018-06-22 15:49:41,994 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:49:42,014 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:49:42,014 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2018-06-22 15:49:42,014 INFO ]: Interpolant automaton has 15 states [2018-06-22 15:49:42,014 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 15:49:42,014 INFO ]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:49:42,015 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2018-06-22 15:49:42,375 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:49:42,375 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:49:42,376 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:49:42,377 INFO ]: Start accepts. Automaton has 15 states. Word has length 25 [2018-06-22 15:49:42,377 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:49:42,377 INFO ]: With dead ends: 21 [2018-06-22 15:49:42,377 INFO ]: Without dead ends: 21 [2018-06-22 15:49:42,378 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:49:42,378 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:49:42,381 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:49:42,381 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:49:42,382 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:49:42,382 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:49:42,383 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:49:42,383 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:49:42,383 INFO ]: Interpolant automaton has 15 states. [2018-06-22 15:49:42,383 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:49:42,383 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:49:42,383 INFO ]: Found error trace [2018-06-22 15:49:42,384 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:49:42,384 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:49:42,384 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:49:42,384 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:49:42,384 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:49:42,385 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:42,385 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:49:42,385 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:42,417 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:42,983 WARN ]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 15:49:43,180 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:49:43,180 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:49:43,180 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 15:49:43,186 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:49:43,223 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:49:43,223 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:43,227 INFO ]: Computing forward predicates... [2018-06-22 15:49:43,599 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:49:43,619 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:49:43,619 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2018-06-22 15:49:43,619 INFO ]: Interpolant automaton has 17 states [2018-06-22 15:49:43,620 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 15:49:43,620 INFO ]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:49:43,620 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 17 states. [2018-06-22 15:49:43,985 WARN ]: Spent 336.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-06-22 15:49:44,150 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2018-06-22 15:49:44,289 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 19 [2018-06-22 15:49:44,543 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2018-06-22 15:49:44,587 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:49:44,587 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:49:44,589 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:49:44,589 INFO ]: Start accepts. Automaton has 17 states. Word has length 29 [2018-06-22 15:49:44,589 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:49:44,590 INFO ]: With dead ends: 23 [2018-06-22 15:49:44,590 INFO ]: Without dead ends: 23 [2018-06-22 15:49:44,590 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2018-06-22 15:49:44,590 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:49:44,593 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:49:44,593 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:49:44,594 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:49:44,594 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:49:44,594 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:49:44,595 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:49:44,595 INFO ]: Interpolant automaton has 17 states. [2018-06-22 15:49:44,595 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:49:44,595 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:49:44,595 INFO ]: Found error trace [2018-06-22 15:49:44,595 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:49:44,596 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:49:44,596 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:49:44,596 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:49:44,596 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:49:44,596 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:44,596 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:49:44,596 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:44,641 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:44,998 WARN ]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-06-22 15:49:45,361 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:49:45,361 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:49:45,361 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:49:45,368 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:49:45,429 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:49:45,429 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:45,433 INFO ]: Computing forward predicates... [2018-06-22 15:49:45,738 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2018-06-22 15:49:47,829 WARN ]: Spent 486.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 15:49:47,899 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:49:47,929 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:49:47,929 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2018-06-22 15:49:47,929 INFO ]: Interpolant automaton has 29 states [2018-06-22 15:49:47,929 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-22 15:49:47,930 INFO ]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2018-06-22 15:49:47,930 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 29 states. [2018-06-22 15:49:48,364 WARN ]: Spent 398.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2018-06-22 15:49:48,841 WARN ]: Spent 438.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2018-06-22 15:49:49,133 WARN ]: Spent 217.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2018-06-22 15:49:49,365 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2018-06-22 15:49:49,818 WARN ]: Spent 406.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2018-06-22 15:49:50,215 WARN ]: Spent 370.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2018-06-22 15:49:50,462 WARN ]: Spent 221.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2018-06-22 15:49:50,619 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:49:50,619 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:49:50,620 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:49:50,620 INFO ]: Start accepts. Automaton has 29 states. Word has length 33 [2018-06-22 15:49:50,620 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:49:50,621 INFO ]: With dead ends: 25 [2018-06-22 15:49:50,621 INFO ]: Without dead ends: 25 [2018-06-22 15:49:50,622 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 15:49:50,622 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:49:50,625 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:49:50,625 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:49:50,626 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:49:50,626 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:49:50,626 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:49:50,626 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:49:50,626 INFO ]: Interpolant automaton has 29 states. [2018-06-22 15:49:50,626 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:49:50,627 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:49:50,627 INFO ]: Found error trace [2018-06-22 15:49:50,627 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:49:50,627 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:49:50,627 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:49:50,627 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:49:50,627 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:49:50,628 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:50,628 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:49:50,628 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:49:50,701 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:51,594 WARN ]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 15:49:51,859 WARN ]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-06-22 15:49:52,230 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:49:52,230 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:49:52,230 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:49:52,236 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:49:52,285 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:49:52,290 INFO ]: Computing forward predicates... [2018-06-22 15:50:02,213 WARN ]: Spent 8.79 s on a formula simplification. DAG size of input: 993 DAG size of output: 83 [2018-06-22 15:50:04,310 WARN ]: Spent 1.71 s on a formula simplification. DAG size of input: 255 DAG size of output: 77 [2018-06-22 15:50:04,749 WARN ]: Spent 340.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2018-06-22 15:50:04,919 WARN ]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-06-22 15:50:09,015 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:50:09,035 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:50:09,035 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2018-06-22 15:50:09,036 INFO ]: Interpolant automaton has 28 states [2018-06-22 15:50:09,036 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 15:50:09,036 INFO ]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2018-06-22 15:50:09,036 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 28 states. [2018-06-22 15:50:10,597 WARN ]: Spent 1.50 s on a formula simplification. DAG size of input: 157 DAG size of output: 109 [2018-06-22 15:50:11,601 WARN ]: Spent 947.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 35 [2018-06-22 15:50:12,575 WARN ]: Spent 932.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 35 [2018-06-22 15:50:13,356 WARN ]: Spent 734.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 71 [2018-06-22 15:50:14,416 WARN ]: Spent 1.01 s on a formula simplification. DAG size of input: 160 DAG size of output: 72 [2018-06-22 15:50:15,767 WARN ]: Spent 1.29 s on a formula simplification. DAG size of input: 161 DAG size of output: 44 [2018-06-22 15:50:16,678 WARN ]: Spent 834.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 78 [2018-06-22 15:50:17,808 WARN ]: Spent 1.08 s on a formula simplification. DAG size of input: 158 DAG size of output: 83 [2018-06-22 15:50:17,919 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:50:17,920 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:50:17,920 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:50:17,920 INFO ]: Start accepts. Automaton has 28 states. Word has length 37 [2018-06-22 15:50:17,920 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:50:17,921 INFO ]: With dead ends: 27 [2018-06-22 15:50:17,921 INFO ]: Without dead ends: 27 [2018-06-22 15:50:17,922 INFO ]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 15:50:17,922 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:50:17,924 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:50:17,924 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:50:17,925 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:50:17,926 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:50:17,926 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:50:17,926 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:50:17,926 INFO ]: Interpolant automaton has 28 states. [2018-06-22 15:50:17,926 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:50:17,927 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:50:17,927 INFO ]: Found error trace [2018-06-22 15:50:17,927 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:50:17,927 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:50:17,927 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 8 times [2018-06-22 15:50:17,927 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:50:17,927 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:50:17,928 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:50:17,928 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:50:17,928 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:50:18,014 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:50:18,792 WARN ]: Spent 524.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-06-22 15:50:18,974 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-06-22 15:50:19,141 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2018-06-22 15:50:19,298 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2018-06-22 15:50:19,771 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:50:19,771 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:50:19,771 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:50:19,776 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:50:19,830 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:50:19,830 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:50:19,835 INFO ]: Computing forward predicates... [2018-06-22 15:50:20,208 WARN ]: Spent 209.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2018-06-22 15:50:20,444 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2018-06-22 15:50:20,624 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2018-06-22 15:50:21,231 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:50:21,250 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:50:21,250 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2018-06-22 15:50:21,251 INFO ]: Interpolant automaton has 31 states [2018-06-22 15:50:21,251 INFO ]: Constructing interpolant automaton starting with 31 interpolants. [2018-06-22 15:50:21,251 INFO ]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2018-06-22 15:50:21,251 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 31 states. [2018-06-22 15:50:22,043 WARN ]: Spent 718.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2018-06-22 15:50:22,252 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 33 [2018-06-22 15:50:22,488 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 33 [2018-06-22 15:50:22,682 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 30 [2018-06-22 15:50:23,033 WARN ]: Spent 263.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 38 [2018-06-22 15:50:23,383 WARN ]: Spent 301.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 46 [2018-06-22 15:50:23,890 WARN ]: Spent 471.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2018-06-22 15:50:24,351 WARN ]: Spent 426.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 46 [2018-06-22 15:50:24,929 WARN ]: Spent 520.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 58 [2018-06-22 15:50:25,147 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:50:25,147 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:50:25,148 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:50:25,148 INFO ]: Start accepts. Automaton has 31 states. Word has length 41 [2018-06-22 15:50:25,148 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:50:25,149 INFO ]: With dead ends: 29 [2018-06-22 15:50:25,149 INFO ]: Without dead ends: 29 [2018-06-22 15:50:25,150 INFO ]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 15:50:25,150 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:50:25,155 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:50:25,155 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:50:25,156 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:50:25,156 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:50:25,156 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:50:25,156 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:50:25,156 INFO ]: Interpolant automaton has 31 states. [2018-06-22 15:50:25,156 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:50:25,158 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:50:25,158 INFO ]: Found error trace [2018-06-22 15:50:25,158 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:50:25,158 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:50:25,158 INFO ]: Analyzing trace with hash 1442343014, now seen corresponding path program 9 times [2018-06-22 15:50:25,158 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:50:25,158 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:50:25,159 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:50:25,159 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:50:25,159 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:50:25,236 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:50:26,147 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:50:26,147 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:50:26,147 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:50:26,153 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:50:26,213 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:50:26,213 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:50:26,219 INFO ]: Computing forward predicates... [2018-06-22 15:50:26,656 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2018-06-22 15:50:27,229 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:50:27,249 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:50:27,249 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 37 [2018-06-22 15:50:27,250 INFO ]: Interpolant automaton has 37 states [2018-06-22 15:50:27,250 INFO ]: Constructing interpolant automaton starting with 37 interpolants. [2018-06-22 15:50:27,250 INFO ]: CoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 15:50:27,250 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 37 states. [2018-06-22 15:50:28,025 WARN ]: Spent 727.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2018-06-22 15:50:28,296 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2018-06-22 15:50:28,496 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 31 [2018-06-22 15:50:28,649 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2018-06-22 15:50:28,927 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2018-06-22 15:50:29,163 WARN ]: Spent 205.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2018-06-22 15:50:29,391 WARN ]: Spent 193.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 37 [2018-06-22 15:50:30,661 WARN ]: Spent 264.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2018-06-22 15:50:30,861 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2018-06-22 15:50:31,344 WARN ]: Spent 453.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2018-06-22 15:50:31,380 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:50:31,380 INFO ]: Finished difference Result 31 states and 32 transitions. [2018-06-22 15:50:31,380 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 15:50:31,380 INFO ]: Start accepts. Automaton has 37 states. Word has length 45 [2018-06-22 15:50:31,381 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:50:31,381 INFO ]: With dead ends: 31 [2018-06-22 15:50:31,381 INFO ]: Without dead ends: 31 [2018-06-22 15:50:31,382 INFO ]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=357, Invalid=1899, Unknown=0, NotChecked=0, Total=2256 [2018-06-22 15:50:31,382 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 15:50:31,389 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-06-22 15:50:31,389 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 15:50:31,390 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-06-22 15:50:31,390 INFO ]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 45 [2018-06-22 15:50:31,390 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:50:31,390 INFO ]: Abstraction has 31 states and 32 transitions. [2018-06-22 15:50:31,390 INFO ]: Interpolant automaton has 37 states. [2018-06-22 15:50:31,390 INFO ]: Start isEmpty. Operand 31 states and 32 transitions. [2018-06-22 15:50:31,391 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 15:50:31,391 INFO ]: Found error trace [2018-06-22 15:50:31,391 INFO ]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:50:31,391 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:50:31,391 INFO ]: Analyzing trace with hash 352352522, now seen corresponding path program 10 times [2018-06-22 15:50:31,391 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:50:31,391 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:50:31,392 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:50:31,392 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:50:31,392 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:50:31,443 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:50:32,348 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:50:32,348 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:50:32,348 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:50:32,354 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:50:32,414 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:50:32,414 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:50:32,424 INFO ]: Computing forward predicates... [2018-06-22 15:50:35,379 WARN ]: Spent 2.64 s on a formula simplification. DAG size of input: 438 DAG size of output: 82 [2018-06-22 15:50:36,253 WARN ]: Spent 786.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 55 [2018-06-22 15:50:36,555 WARN ]: Spent 254.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2018-06-22 15:50:37,003 WARN ]: Spent 390.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-06-22 15:50:37,373 WARN ]: Spent 317.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2018-06-22 15:50:37,575 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2018-06-22 15:50:39,609 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:50:39,630 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:50:39,630 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2018-06-22 15:50:39,630 INFO ]: Interpolant automaton has 45 states [2018-06-22 15:50:39,631 INFO ]: Constructing interpolant automaton starting with 45 interpolants. [2018-06-22 15:50:39,631 INFO ]: CoverageRelationStatistics Valid=164, Invalid=1816, Unknown=0, NotChecked=0, Total=1980 [2018-06-22 15:50:39,631 INFO ]: Start difference. First operand 31 states and 32 transitions. Second operand 45 states. [2018-06-22 15:50:40,951 WARN ]: Spent 1.22 s on a formula simplification. DAG size of input: 232 DAG size of output: 122 Received shutdown request... [2018-06-22 15:50:41,047 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 15:50:41,047 WARN ]: Verification canceled [2018-06-22 15:50:41,050 WARN ]: Timeout [2018-06-22 15:50:41,050 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:50:41 BoogieIcfgContainer [2018-06-22 15:50:41,050 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:50:41,051 INFO ]: Toolchain (without parser) took 63899.13 ms. Allocated memory was 305.1 MB in the beginning and 816.8 MB in the end (delta: 511.7 MB). Free memory was 257.5 MB in the beginning and 186.1 MB in the end (delta: 71.4 MB). Peak memory consumption was 583.1 MB. Max. memory is 3.6 GB. [2018-06-22 15:50:41,051 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 305.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:50:41,051 INFO ]: ChcToBoogie took 50.28 ms. Allocated memory is still 305.1 MB. Free memory was 257.5 MB in the beginning and 255.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:50:41,052 INFO ]: Boogie Preprocessor took 50.73 ms. Allocated memory is still 305.1 MB. Free memory was 255.5 MB in the beginning and 253.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:50:41,052 INFO ]: RCFGBuilder took 245.52 ms. Allocated memory is still 305.1 MB. Free memory was 253.6 MB in the beginning and 245.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:50:41,053 INFO ]: TraceAbstraction took 63534.80 ms. Allocated memory was 305.1 MB in the beginning and 816.8 MB in the end (delta: 511.7 MB). Free memory was 245.6 MB in the beginning and 186.1 MB in the end (delta: 59.4 MB). Peak memory consumption was 571.1 MB. Max. memory is 3.6 GB. [2018-06-22 15:50:41,055 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 305.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 50.28 ms. Allocated memory is still 305.1 MB. Free memory was 257.5 MB in the beginning and 255.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 50.73 ms. Allocated memory is still 305.1 MB. Free memory was 255.5 MB in the beginning and 253.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 245.52 ms. Allocated memory is still 305.1 MB. Free memory was 253.6 MB in the beginning and 245.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63534.80 ms. Allocated memory was 305.1 MB in the beginning and 816.8 MB in the end (delta: 511.7 MB). Free memory was 245.6 MB in the beginning and 186.1 MB in the end (delta: 59.4 MB). Peak memory consumption was 571.1 MB. 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 constructing difference of abstraction (31states) and interpolant automaton (currently 5 states, 45 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 47 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 63.4s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 23.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 144 SDtfs, 486 SDslu, 1027 SDs, 0 SdLazy, 925 SolverSat, 590 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 515 GetRequests, 238 SyntacticMatches, 5 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 50.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 38.0s InterpolantComputationTime, 629 NumberOfCodeBlocks, 629 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 608 ConstructedInterpolants, 0 QuantifiedInterpolants, 80188068 SizeOfPredicates, 616 NumberOfNonLiveVariables, 2365 ConjunctsInSsa, 521 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 440/1650 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/xyz.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-50-41-065.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/xyz.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-50-41-065.csv Completed graceful shutdown