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/ex3_e7_590.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 14:58:48,133 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 14:58:48,135 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 14:58:48,152 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 14:58:48,152 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 14:58:48,154 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 14:58:48,155 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 14:58:48,160 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 14:58:48,162 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 14:58:48,165 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 14:58:48,166 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 14:58:48,166 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 14:58:48,167 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 14:58:48,170 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 14:58:48,170 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 14:58:48,171 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 14:58:48,173 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 14:58:48,181 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 14:58:48,187 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 14:58:48,189 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 14:58:48,190 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 14:58:48,194 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 14:58:48,195 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 14:58:48,195 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 14:58:48,196 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 14:58:48,197 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 14:58:48,197 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 14:58:48,201 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 14:58:48,202 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 14:58:48,203 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 14:58:48,203 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 14:58:48,207 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 14:58:48,207 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 14:58:48,208 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 14:58:48,209 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 14:58:48,210 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 14:58:48,236 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 14:58:48,237 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 14:58:48,237 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 14:58:48,237 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 14:58:48,240 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 14:58:48,240 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 14:58:48,240 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 14:58:48,240 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 14:58:48,240 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 14:58:48,241 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 14:58:48,241 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 14:58:48,241 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 14:58:48,241 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 14:58:48,241 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 14:58:48,241 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 14:58:48,242 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 14:58:48,244 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 14:58:48,246 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 14:58:48,246 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 14:58:48,294 INFO ]: Repository-Root is: /tmp [2018-06-18 14:58:48,311 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 14:58:48,317 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 14:58:48,318 INFO ]: Initializing SmtParser... [2018-06-18 14:58:48,318 INFO ]: SmtParser initialized [2018-06-18 14:58:48,319 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e7_590.smt2 [2018-06-18 14:58:48,320 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 14:58:48,415 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e7_590.smt2 unknown [2018-06-18 14:58:48,749 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/ex3_e7_590.smt2 [2018-06-18 14:58:48,754 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 14:58:48,769 INFO ]: Walking toolchain with 4 elements. [2018-06-18 14:58:48,770 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 14:58:48,770 INFO ]: Initializing ChcToBoogie... [2018-06-18 14:58:48,770 INFO ]: ChcToBoogie initialized [2018-06-18 14:58:48,777 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:58:48" (1/1) ... [2018-06-18 14:58:48,846 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:48 Unit [2018-06-18 14:58:48,846 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 14:58:48,846 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 14:58:48,846 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 14:58:48,847 INFO ]: Boogie Preprocessor initialized [2018-06-18 14:58:48,867 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:48" (1/1) ... [2018-06-18 14:58:48,867 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:48" (1/1) ... [2018-06-18 14:58:48,875 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:48" (1/1) ... [2018-06-18 14:58:48,875 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:48" (1/1) ... [2018-06-18 14:58:48,878 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:48" (1/1) ... [2018-06-18 14:58:48,880 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:48" (1/1) ... [2018-06-18 14:58:48,881 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:48" (1/1) ... [2018-06-18 14:58:48,883 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 14:58:48,884 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 14:58:48,884 INFO ]: Initializing RCFGBuilder... [2018-06-18 14:58:48,884 INFO ]: RCFGBuilder initialized [2018-06-18 14:58:48,885 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:48" (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 14:58:48,901 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 14:58:48,901 INFO ]: Found specification of procedure False [2018-06-18 14:58:48,901 INFO ]: Found implementation of procedure False [2018-06-18 14:58:48,901 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 14:58:48,901 INFO ]: Found specification of procedure state [2018-06-18 14:58:48,901 INFO ]: Found implementation of procedure state [2018-06-18 14:58:48,901 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 14:58:48,901 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 14:58:48,901 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 14:58:49,255 INFO ]: Using library mode [2018-06-18 14:58:49,258 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:58:49 BoogieIcfgContainer [2018-06-18 14:58:49,258 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 14:58:49,260 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 14:58:49,260 INFO ]: Initializing TraceAbstraction... [2018-06-18 14:58:49,270 INFO ]: TraceAbstraction initialized [2018-06-18 14:58:49,271 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:58:48" (1/3) ... [2018-06-18 14:58:49,272 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30499040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 02:58:49, skipping insertion in model container [2018-06-18 14:58:49,272 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:58:48" (2/3) ... [2018-06-18 14:58:49,272 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30499040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 02:58:49, skipping insertion in model container [2018-06-18 14:58:49,272 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:58:49" (3/3) ... [2018-06-18 14:58:49,274 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 14:58:49,284 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 14:58:49,296 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 14:58:49,336 INFO ]: Using default assertion order modulation [2018-06-18 14:58:49,337 INFO ]: Interprodecural is true [2018-06-18 14:58:49,337 INFO ]: Hoare is false [2018-06-18 14:58:49,337 INFO ]: Compute interpolants for FPandBP [2018-06-18 14:58:49,337 INFO ]: Backedges is TWOTRACK [2018-06-18 14:58:49,337 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 14:58:49,337 INFO ]: Difference is false [2018-06-18 14:58:49,337 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 14:58:49,337 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 14:58:49,351 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 14:58:49,362 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 14:58:49,362 INFO ]: Found error trace [2018-06-18 14:58:49,363 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:58:49,363 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:58:49,367 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 14:58:49,368 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:58:49,369 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:58:49,404 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:49,404 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:58:49,404 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:49,479 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:58:49,488 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:58:49,578 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 14:58:49,580 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 14:58:49,580 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 14:58:49,582 INFO ]: Interpolant automaton has 4 states [2018-06-18 14:58:49,593 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 14:58:49,593 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 14:58:49,595 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 14:58:49,714 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:58:49,714 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 14:58:49,715 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 14:58:49,717 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 14:58:49,717 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:58:49,735 INFO ]: With dead ends: 13 [2018-06-18 14:58:49,735 INFO ]: Without dead ends: 13 [2018-06-18 14:58:49,737 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 [2018-06-18 14:58:49,757 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 14:58:49,788 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 14:58:49,789 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 14:58:49,789 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 14:58:49,790 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 14:58:49,791 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:58:49,791 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 14:58:49,791 INFO ]: Interpolant automaton has 4 states. [2018-06-18 14:58:49,791 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 14:58:49,792 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 14:58:49,792 INFO ]: Found error trace [2018-06-18 14:58:49,792 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:58:49,792 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:58:49,792 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 14:58:49,792 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:58:49,792 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:58:49,793 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:49,793 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:58:49,793 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:49,850 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:58:49,851 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:58:50,003 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:58:50,003 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:58:50,003 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 14:58:50,024 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:58:50,089 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:58:50,100 INFO ]: Computing forward predicates... [2018-06-18 14:58:50,544 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-06-18 14:58:50,630 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:58:50,652 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:58:50,652 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 14:58:50,652 INFO ]: Interpolant automaton has 8 states [2018-06-18 14:58:50,653 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 14:58:50,653 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-18 14:58:50,653 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 14:58:50,954 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-06-18 14:58:50,991 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:58:50,991 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 14:58:50,992 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 14:58:50,992 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 14:58:50,993 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:58:50,993 INFO ]: With dead ends: 15 [2018-06-18 14:58:50,993 INFO ]: Without dead ends: 15 [2018-06-18 14:58:50,994 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-18 14:58:50,994 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 14:58:50,998 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 14:58:50,998 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 14:58:50,999 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 14:58:50,999 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 14:58:50,999 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:58:50,999 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 14:58:50,999 INFO ]: Interpolant automaton has 8 states. [2018-06-18 14:58:50,999 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 14:58:51,000 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 14:58:51,002 INFO ]: Found error trace [2018-06-18 14:58:51,002 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:58:51,002 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:58:51,002 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 14:58:51,002 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:58:51,002 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:58:51,003 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:51,003 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:58:51,003 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:51,136 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:58:51,137 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:58:52,164 WARN ]: Spent 819.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2018-06-18 14:58:52,520 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:58:52,521 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:58:52,521 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 14:58:52,529 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 14:58:52,592 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 14:58:52,592 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:58:52,597 INFO ]: Computing forward predicates... [2018-06-18 14:58:52,802 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2018-06-18 14:58:53,630 WARN ]: Spent 481.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2018-06-18 14:58:53,695 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:58:53,730 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:58:53,730 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 14:58:53,730 INFO ]: Interpolant automaton has 13 states [2018-06-18 14:58:53,730 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 14:58:53,731 INFO ]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-06-18 14:58:53,731 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 14:58:54,217 WARN ]: Spent 374.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2018-06-18 14:58:54,330 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2018-06-18 14:58:54,515 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2018-06-18 14:58:54,937 WARN ]: Spent 381.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2018-06-18 14:58:54,970 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:58:54,970 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 14:58:54,972 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 14:58:54,972 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 14:58:54,972 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:58:54,972 INFO ]: With dead ends: 17 [2018-06-18 14:58:54,973 INFO ]: Without dead ends: 17 [2018-06-18 14:58:54,973 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-06-18 14:58:54,973 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 14:58:54,978 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 14:58:54,978 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 14:58:54,978 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 14:58:54,979 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 14:58:54,979 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:58:54,979 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 14:58:54,979 INFO ]: Interpolant automaton has 13 states. [2018-06-18 14:58:54,979 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 14:58:54,979 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 14:58:54,979 INFO ]: Found error trace [2018-06-18 14:58:54,980 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:58:54,980 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:58:54,980 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 14:58:54,980 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:58:54,980 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:58:54,981 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:54,981 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 14:58:54,981 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:58:55,038 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:58:55,039 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:58:55,686 WARN ]: Spent 195.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 7 [2018-06-18 14:58:55,687 INFO ]: Checked inductivity of 21 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-18 14:58:55,687 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:58:55,687 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 14:58:55,702 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 14:58:55,793 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 14:58:55,793 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:58:55,800 INFO ]: Computing forward predicates... [2018-06-18 14:58:55,971 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 14:58:56,012 WARN ]: expecting exponential blowup for input size 10 [2018-06-18 14:58:56,914 INFO ]: Checked inductivity of 21 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-18 14:58:56,935 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:58:56,935 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 14:58:56,935 INFO ]: Interpolant automaton has 9 states [2018-06-18 14:58:56,935 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 14:58:56,935 INFO ]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-06-18 14:58:56,936 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-06-18 14:58:57,245 WARN ]: Spent 297.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2018-06-18 14:58:57,329 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:58:57,329 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 14:58:57,330 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 14:58:57,330 INFO ]: Start accepts. Automaton has 9 states. Word has length 21 [2018-06-18 14:58:57,330 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:58:57,330 INFO ]: With dead ends: 13 [2018-06-18 14:58:57,330 INFO ]: Without dead ends: 0 [2018-06-18 14:58:57,331 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-06-18 14:58:57,331 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 14:58:57,331 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 14:58:57,331 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 14:58:57,331 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 14:58:57,331 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-18 14:58:57,331 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:58:57,331 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 14:58:57,331 INFO ]: Interpolant automaton has 9 states. [2018-06-18 14:58:57,331 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 14:58:57,331 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 14:58:57,335 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 02:58:57 BoogieIcfgContainer [2018-06-18 14:58:57,335 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 14:58:57,336 INFO ]: Toolchain (without parser) took 8581.91 ms. Allocated memory was 308.3 MB in the beginning and 367.0 MB in the end (delta: 58.7 MB). Free memory was 260.8 MB in the beginning and 252.3 MB in the end (delta: 8.6 MB). Peak memory consumption was 67.3 MB. Max. memory is 3.6 GB. [2018-06-18 14:58:57,337 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.3 MB. Free memory is still 272.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 14:58:57,337 INFO ]: ChcToBoogie took 76.50 ms. Allocated memory is still 308.3 MB. Free memory was 260.8 MB in the beginning and 256.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:58:57,338 INFO ]: Boogie Preprocessor took 36.70 ms. Allocated memory is still 308.3 MB. Free memory is still 256.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 14:58:57,338 INFO ]: RCFGBuilder took 374.70 ms. Allocated memory is still 308.3 MB. Free memory was 256.9 MB in the beginning and 244.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:58:57,339 INFO ]: TraceAbstraction took 8075.57 ms. Allocated memory was 308.3 MB in the beginning and 367.0 MB in the end (delta: 58.7 MB). Free memory was 244.9 MB in the beginning and 252.3 MB in the end (delta: -7.4 MB). Peak memory consumption was 51.3 MB. Max. memory is 3.6 GB. [2018-06-18 14:58:57,342 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 308.3 MB. Free memory is still 272.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 76.50 ms. Allocated memory is still 308.3 MB. Free memory was 260.8 MB in the beginning and 256.9 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 36.70 ms. Allocated memory is still 308.3 MB. Free memory is still 256.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 374.70 ms. Allocated memory is still 308.3 MB. Free memory was 256.9 MB in the beginning and 244.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 8075.57 ms. Allocated memory was 308.3 MB in the beginning and 367.0 MB in the end (delta: 58.7 MB). Free memory was 244.9 MB in the beginning and 252.3 MB in the end (delta: -7.4 MB). Peak memory consumption was 51.3 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, 8.0s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 2.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 23 SDslu, 112 SDs, 0 SdLazy, 90 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 4.9s 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: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 12164 SizeOfPredicates, 64 NumberOfNonLiveVariables, 717 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 40/68 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/ex3_e7_590.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_14-58-57-352.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ex3_e7_590.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_14-58-57-352.csv Received shutdown request...