java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/ticket3i_6_e7_1096_e7_2688.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 17:04:58,536 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 17:04:58,539 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 17:04:58,553 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 17:04:58,553 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 17:04:58,555 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 17:04:58,556 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 17:04:58,560 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 17:04:58,562 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 17:04:58,562 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 17:04:58,564 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 17:04:58,565 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 17:04:58,566 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 17:04:58,567 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 17:04:58,567 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 17:04:58,570 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 17:04:58,572 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 17:04:58,585 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 17:04:58,587 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 17:04:58,589 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 17:04:58,590 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 17:04:58,592 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 17:04:58,592 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 17:04:58,592 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 17:04:58,593 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 17:04:58,594 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 17:04:58,595 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 17:04:58,595 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 17:04:58,602 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 17:04:58,602 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 17:04:58,603 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 17:04:58,604 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 17:04:58,604 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 17:04:58,605 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 17:04:58,605 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 17:04:58,605 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 17:04:58,627 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 17:04:58,628 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 17:04:58,628 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 17:04:58,628 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 17:04:58,630 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 17:04:58,630 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 17:04:58,630 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 17:04:58,630 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 17:04:58,630 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 17:04:58,631 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 17:04:58,631 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 17:04:58,631 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 17:04:58,631 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 17:04:58,631 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 17:04:58,632 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 17:04:58,632 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 17:04:58,632 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 17:04:58,637 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 17:04:58,637 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 17:04:58,688 INFO ]: Repository-Root is: /tmp [2018-06-18 17:04:58,705 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 17:04:58,710 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 17:04:58,712 INFO ]: Initializing SmtParser... [2018-06-18 17:04:58,712 INFO ]: SmtParser initialized [2018-06-18 17:04:58,713 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/ticket3i_6_e7_1096_e7_2688.smt2 [2018-06-18 17:04:58,714 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 [2018-06-18 17:04:58,812 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ticket3i_6_e7_1096_e7_2688.smt2 unknown [2018-06-18 17:04:59,383 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ticket3i_6_e7_1096_e7_2688.smt2 [2018-06-18 17:04:59,388 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 17:04:59,394 INFO ]: Walking toolchain with 4 elements. [2018-06-18 17:04:59,394 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 17:04:59,395 INFO ]: Initializing ChcToBoogie... [2018-06-18 17:04:59,395 INFO ]: ChcToBoogie initialized [2018-06-18 17:04:59,402 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 05:04:59" (1/1) ... [2018-06-18 17:04:59,520 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:04:59 Unit [2018-06-18 17:04:59,520 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 17:04:59,521 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 17:04:59,521 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 17:04:59,521 INFO ]: Boogie Preprocessor initialized [2018-06-18 17:04:59,544 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:04:59" (1/1) ... [2018-06-18 17:04:59,545 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:04:59" (1/1) ... [2018-06-18 17:04:59,581 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:04:59" (1/1) ... [2018-06-18 17:04:59,581 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:04:59" (1/1) ... [2018-06-18 17:04:59,600 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:04:59" (1/1) ... [2018-06-18 17:04:59,601 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:04:59" (1/1) ... [2018-06-18 17:04:59,604 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:04:59" (1/1) ... [2018-06-18 17:04:59,618 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 17:04:59,619 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 17:04:59,619 INFO ]: Initializing RCFGBuilder... [2018-06-18 17:04:59,619 INFO ]: RCFGBuilder initialized [2018-06-18 17:04:59,620 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:04:59" (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) [2018-06-18 17:04:59,634 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 17:04:59,634 INFO ]: Found specification of procedure False [2018-06-18 17:04:59,634 INFO ]: Found implementation of procedure False [2018-06-18 17:04:59,634 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 17:04:59,634 INFO ]: Found specification of procedure state [2018-06-18 17:04:59,634 INFO ]: Found implementation of procedure state [2018-06-18 17:04:59,634 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 17:04:59,634 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 17:04:59,634 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 [2018-06-18 17:05:00,136 INFO ]: Using library mode [2018-06-18 17:05:00,137 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 05:05:00 BoogieIcfgContainer [2018-06-18 17:05:00,138 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 17:05:00,139 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 17:05:00,139 INFO ]: Initializing TraceAbstraction... [2018-06-18 17:05:00,144 INFO ]: TraceAbstraction initialized [2018-06-18 17:05:00,145 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 05:04:59" (1/3) ... [2018-06-18 17:05:00,146 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57153859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 05:05:00, skipping insertion in model container [2018-06-18 17:05:00,146 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 05:04:59" (2/3) ... [2018-06-18 17:05:00,146 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57153859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 05:05:00, skipping insertion in model container [2018-06-18 17:05:00,146 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 05:05:00" (3/3) ... [2018-06-18 17:05:00,149 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 17:05:00,159 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 17:05:00,169 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 17:05:00,219 INFO ]: Using default assertion order modulation [2018-06-18 17:05:00,219 INFO ]: Interprodecural is true [2018-06-18 17:05:00,219 INFO ]: Hoare is false [2018-06-18 17:05:00,219 INFO ]: Compute interpolants for FPandBP [2018-06-18 17:05:00,219 INFO ]: Backedges is TWOTRACK [2018-06-18 17:05:00,220 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 17:05:00,220 INFO ]: Difference is false [2018-06-18 17:05:00,220 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 17:05:00,220 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 17:05:00,238 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 17:05:00,262 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 17:05:00,263 INFO ]: Found error trace [2018-06-18 17:05:00,264 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:05:00,264 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:05:00,270 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 17:05:00,272 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:05:00,272 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:05:00,313 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:05:00,313 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 17:05:00,313 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:05:00,447 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:05:00,454 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:05:00,907 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 5 [2018-06-18 17:05:00,911 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 17:05:00,913 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 17:05:00,913 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 17:05:00,915 INFO ]: Interpolant automaton has 4 states [2018-06-18 17:05:00,931 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 17:05:00,932 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 17:05:00,934 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 17:05:01,077 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 17:05:01,077 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 17:05:01,078 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 17:05:01,080 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 17:05:01,080 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 17:05:01,092 INFO ]: With dead ends: 13 [2018-06-18 17:05:01,093 INFO ]: Without dead ends: 13 [2018-06-18 17:05:01,096 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 17:05:01,114 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 17:05:01,150 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 17:05:01,154 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 17:05:01,155 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 17:05:01,156 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 17:05:01,156 INFO ]: Finished accepts. word is rejected. [2018-06-18 17:05:01,156 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 17:05:01,156 INFO ]: Interpolant automaton has 4 states. [2018-06-18 17:05:01,156 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 17:05:01,158 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 17:05:01,158 INFO ]: Found error trace [2018-06-18 17:05:01,158 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:05:01,158 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:05:01,158 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 17:05:01,158 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:05:01,158 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:05:01,159 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:05:01,159 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 17:05:01,159 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:05:01,351 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:05:01,352 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:05:01,782 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 9 [2018-06-18 17:05:01,820 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 17:05:01,820 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 17:05:01,820 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 [2018-06-18 17:05:01,830 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 17:05:01,979 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:05:01,993 INFO ]: Computing forward predicates... [2018-06-18 17:05:02,636 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 17:05:02,638 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 17:05:02,661 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 17:05:02,662 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 17:05:02,695 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 17:05:02,706 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 17:05:06,701 WARN ]: Spent 646.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 22 [2018-06-18 17:05:06,772 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 17:05:06,809 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 17:05:06,809 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 17:05:06,810 INFO ]: Interpolant automaton has 8 states [2018-06-18 17:05:06,810 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 17:05:06,810 INFO ]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-18 17:05:06,810 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 17:05:07,065 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 17:05:07,065 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 17:05:07,065 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 17:05:07,065 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 17:05:07,065 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 17:05:07,066 INFO ]: With dead ends: 15 [2018-06-18 17:05:07,066 INFO ]: Without dead ends: 15 [2018-06-18 17:05:07,067 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-06-18 17:05:07,067 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 17:05:07,068 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 17:05:07,068 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 17:05:07,072 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 17:05:07,072 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 17:05:07,072 INFO ]: Finished accepts. word is rejected. [2018-06-18 17:05:07,072 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 17:05:07,072 INFO ]: Interpolant automaton has 8 states. [2018-06-18 17:05:07,072 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 17:05:07,073 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 17:05:07,073 INFO ]: Found error trace [2018-06-18 17:05:07,073 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:05:07,073 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:05:07,073 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 17:05:07,073 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:05:07,073 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:05:07,074 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:05:07,074 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 17:05:07,074 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:05:07,212 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:05:07,213 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:05:07,605 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2018-06-18 17:05:07,764 WARN ]: Spent 153.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2018-06-18 17:05:07,825 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 17:05:07,826 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 17:05:07,826 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 [2018-06-18 17:05:07,832 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 17:05:08,004 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 17:05:08,004 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:05:08,011 INFO ]: Computing forward predicates... [2018-06-18 17:05:08,388 WARN ]: expecting exponential blowup for input size 11 [2018-06-18 17:05:18,293 WARN ]: Spent 585.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 22 [2018-06-18 17:05:18,447 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 17:05:18,480 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 17:05:18,480 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-18 17:05:18,480 INFO ]: Interpolant automaton has 12 states [2018-06-18 17:05:18,480 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-18 17:05:18,480 INFO ]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-06-18 17:05:18,481 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-18 17:05:18,801 WARN ]: Spent 257.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2018-06-18 17:05:19,035 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 17:05:19,036 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 17:05:19,036 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 17:05:19,036 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-18 17:05:19,036 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 17:05:19,037 INFO ]: With dead ends: 17 [2018-06-18 17:05:19,037 INFO ]: Without dead ends: 17 [2018-06-18 17:05:19,037 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-06-18 17:05:19,038 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 17:05:19,042 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 17:05:19,042 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 17:05:19,043 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 17:05:19,043 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 17:05:19,043 INFO ]: Finished accepts. word is rejected. [2018-06-18 17:05:19,043 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 17:05:19,043 INFO ]: Interpolant automaton has 12 states. [2018-06-18 17:05:19,043 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 17:05:19,044 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 17:05:19,044 INFO ]: Found error trace [2018-06-18 17:05:19,044 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 17:05:19,044 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 17:05:19,045 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-18 17:05:19,045 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 17:05:19,045 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 17:05:19,045 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:05:19,046 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 17:05:19,046 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 17:05:19,210 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:05:19,211 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 17:05:19,699 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 17:05:19,699 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 17:05:19,699 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 [2018-06-18 17:05:19,707 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 17:05:19,890 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 17:05:19,890 INFO ]: Conjunction of SSA is unsat [2018-06-18 17:05:19,899 INFO ]: Computing forward predicates... [2018-06-18 17:05:20,154 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 17:05:20,180 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 17:05:20,285 WARN ]: expecting exponential blowup for input size 10 [2018-06-18 17:05:20,662 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 17:05:20,672 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 17:05:23,550 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 7 [2018-06-18 17:05:23,593 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 17:05:23,595 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 17:05:23,603 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 17:05:23,608 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 17:05:24,937 WARN ]: Spent 600.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 16 [2018-06-18 17:05:25,247 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 17:05:25,269 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 17:05:25,269 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-18 17:05:25,270 INFO ]: Interpolant automaton has 16 states [2018-06-18 17:05:25,270 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-18 17:05:25,270 INFO ]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-06-18 17:05:25,270 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-18 17:05:25,796 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 17:05:25,796 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 17:05:25,800 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 17:05:25,800 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-18 17:05:25,800 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 17:05:25,800 INFO ]: With dead ends: 13 [2018-06-18 17:05:25,801 INFO ]: Without dead ends: 0 [2018-06-18 17:05:25,801 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2018-06-18 17:05:25,801 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 17:05:25,801 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 17:05:25,801 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 17:05:25,801 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 17:05:25,801 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-18 17:05:25,801 INFO ]: Finished accepts. word is rejected. [2018-06-18 17:05:25,801 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 17:05:25,801 INFO ]: Interpolant automaton has 16 states. [2018-06-18 17:05:25,801 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 17:05:25,801 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 17:05:25,807 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 05:05:25 BoogieIcfgContainer [2018-06-18 17:05:25,807 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 17:05:25,808 INFO ]: Toolchain (without parser) took 26419.61 ms. Allocated memory was 306.7 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 239.1 MB in the beginning and 254.5 MB in the end (delta: -15.4 MB). Peak memory consumption was 1.0 GB. Max. memory is 3.6 GB. [2018-06-18 17:05:25,809 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 17:05:25,810 INFO ]: ChcToBoogie took 126.08 ms. Allocated memory is still 306.7 MB. Free memory was 239.1 MB in the beginning and 234.1 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 3.6 GB. [2018-06-18 17:05:25,810 INFO ]: Boogie Preprocessor took 97.43 ms. Allocated memory is still 306.7 MB. Free memory was 234.1 MB in the beginning and 232.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 17:05:25,810 INFO ]: RCFGBuilder took 518.57 ms. Allocated memory is still 306.7 MB. Free memory was 232.1 MB in the beginning and 199.4 MB in the end (delta: 32.7 MB). Peak memory consumption was 32.7 MB. Max. memory is 3.6 GB. [2018-06-18 17:05:25,811 INFO ]: TraceAbstraction took 25668.51 ms. Allocated memory was 306.7 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 199.4 MB in the beginning and 254.5 MB in the end (delta: -55.1 MB). Peak memory consumption was 961.5 MB. Max. memory is 3.6 GB. [2018-06-18 17:05:25,814 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 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 126.08 ms. Allocated memory is still 306.7 MB. Free memory was 239.1 MB in the beginning and 234.1 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 97.43 ms. Allocated memory is still 306.7 MB. Free memory was 234.1 MB in the beginning and 232.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 518.57 ms. Allocated memory is still 306.7 MB. Free memory was 232.1 MB in the beginning and 199.4 MB in the end (delta: 32.7 MB). Peak memory consumption was 32.7 MB. Max. memory is 3.6 GB. * TraceAbstraction took 25668.51 ms. Allocated memory was 306.7 MB in the beginning and 1.3 GB in the end (delta: 1.0 GB). Free memory was 199.4 MB in the beginning and 254.5 MB in the end (delta: -55.1 MB). Peak memory consumption was 961.5 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 3 procedures, 13 locations, 1 error locations. SAFE Result, 25.5s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 35 SDslu, 130 SDs, 0 SdLazy, 113 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 22.6s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 11000 SizeOfPredicates, 123 NumberOfNonLiveVariables, 2919 ConjunctsInSsa, 174 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 20/68 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/ticket3i_6_e7_1096_e7_2688.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_17-05-25-838.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ticket3i_6_e7_1096_e7_2688.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_17-05-25-838.csv Received shutdown request...