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/SYNAPSE_5_e7_1138_e8_809.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:54:13,945 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:54:13,947 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:54:13,965 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:54:13,965 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:54:13,966 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:54:13,968 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:54:13,972 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:54:13,974 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:54:13,975 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:54:13,977 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:54:13,978 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:54:13,978 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:54:13,980 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:54:13,983 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:54:13,984 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:54:13,986 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:54:13,999 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:54:14,000 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:54:14,002 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:54:14,003 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:54:14,007 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:54:14,008 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:54:14,008 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:54:14,009 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:54:14,010 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:54:14,010 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:54:14,012 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:54:14,014 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:54:14,014 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:54:14,014 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:54:14,015 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:54:14,015 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:54:14,021 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:54:14,022 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:54:14,022 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:54:14,042 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:54:14,043 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:54:14,043 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:54:14,043 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:54:14,044 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:54:14,045 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:54:14,045 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:54:14,045 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:54:14,045 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:54:14,046 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:54:14,046 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:54:14,046 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:54:14,046 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:54:14,046 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:54:14,046 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:54:14,047 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:54:14,047 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:54:14,048 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:54:14,049 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:54:14,102 INFO ]: Repository-Root is: /tmp [2018-06-18 16:54:14,119 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:54:14,125 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:54:14,126 INFO ]: Initializing SmtParser... [2018-06-18 16:54:14,127 INFO ]: SmtParser initialized [2018-06-18 16:54:14,127 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/SYNAPSE_5_e7_1138_e8_809.smt2 [2018-06-18 16:54:14,129 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 16:54:14,223 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/SYNAPSE_5_e7_1138_e8_809.smt2 unknown [2018-06-18 16:54:14,588 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/SYNAPSE_5_e7_1138_e8_809.smt2 [2018-06-18 16:54:14,593 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:54:14,608 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:54:14,609 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:54:14,609 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:54:14,609 INFO ]: ChcToBoogie initialized [2018-06-18 16:54:14,625 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:54:14" (1/1) ... [2018-06-18 16:54:14,754 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:54:14 Unit [2018-06-18 16:54:14,754 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:54:14,755 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:54:14,755 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:54:14,755 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:54:14,779 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:54:14" (1/1) ... [2018-06-18 16:54:14,779 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:54:14" (1/1) ... [2018-06-18 16:54:14,794 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:54:14" (1/1) ... [2018-06-18 16:54:14,794 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:54:14" (1/1) ... [2018-06-18 16:54:14,807 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:54:14" (1/1) ... [2018-06-18 16:54:14,808 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:54:14" (1/1) ... [2018-06-18 16:54:14,810 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:54:14" (1/1) ... [2018-06-18 16:54:14,821 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:54:14,822 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:54:14,822 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:54:14,822 INFO ]: RCFGBuilder initialized [2018-06-18 16:54:14,823 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:54:14" (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 16:54:14,846 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:54:14,846 INFO ]: Found specification of procedure False [2018-06-18 16:54:14,846 INFO ]: Found implementation of procedure False [2018-06-18 16:54:14,846 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:54:14,846 INFO ]: Found specification of procedure state [2018-06-18 16:54:14,846 INFO ]: Found implementation of procedure state [2018-06-18 16:54:14,847 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:54:14,847 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:54:14,847 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 16:54:15,219 INFO ]: Using library mode [2018-06-18 16:54:15,220 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:54:15 BoogieIcfgContainer [2018-06-18 16:54:15,220 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:54:15,224 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:54:15,224 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:54:15,227 INFO ]: TraceAbstraction initialized [2018-06-18 16:54:15,228 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:54:14" (1/3) ... [2018-06-18 16:54:15,228 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4ef8ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 04:54:15, skipping insertion in model container [2018-06-18 16:54:15,229 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:54:14" (2/3) ... [2018-06-18 16:54:15,229 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4ef8ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 04:54:15, skipping insertion in model container [2018-06-18 16:54:15,229 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:54:15" (3/3) ... [2018-06-18 16:54:15,231 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:54:15,242 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:54:15,252 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:54:15,304 INFO ]: Using default assertion order modulation [2018-06-18 16:54:15,305 INFO ]: Interprodecural is true [2018-06-18 16:54:15,305 INFO ]: Hoare is false [2018-06-18 16:54:15,305 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:54:15,305 INFO ]: Backedges is TWOTRACK [2018-06-18 16:54:15,305 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:54:15,305 INFO ]: Difference is false [2018-06-18 16:54:15,305 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:54:15,305 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:54:15,331 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:54:15,351 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:54:15,351 INFO ]: Found error trace [2018-06-18 16:54:15,353 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:54:15,353 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:54:15,359 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 16:54:15,361 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:54:15,362 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:54:15,416 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:54:15,416 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:54:15,416 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:54:15,503 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:54:15,513 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:54:15,719 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:54:15,721 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:54:15,721 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:54:15,723 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:54:15,736 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:54:15,736 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:54:15,738 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:54:15,886 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:54:15,886 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:54:15,887 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:54:15,889 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:54:15,889 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:54:15,905 INFO ]: With dead ends: 13 [2018-06-18 16:54:15,905 INFO ]: Without dead ends: 13 [2018-06-18 16:54:15,909 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:54:15,924 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:54:15,962 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:54:15,963 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:54:15,964 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:54:15,965 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:54:15,966 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:54:15,966 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:54:15,966 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:54:15,966 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:54:15,967 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:54:15,967 INFO ]: Found error trace [2018-06-18 16:54:15,967 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:54:15,968 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:54:15,968 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 16:54:15,968 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:54:15,968 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:54:15,969 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:54:15,969 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:54:15,969 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:54:16,045 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:54:16,046 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:54:17,039 WARN ]: Spent 744.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2018-06-18 16:54:17,232 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-06-18 16:54:17,315 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:54:17,315 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:54:17,315 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 16:54:17,324 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:54:17,414 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:54:17,425 INFO ]: Computing forward predicates... [2018-06-18 16:54:17,497 WARN ]: expecting exponential blowup for input size 13 [2018-06-18 16:54:17,797 WARN ]: Simplifying disjunction of 10368 conjuctions. This might take some time... [2018-06-18 16:54:32,329 INFO ]: Simplified to disjunction of 10368 conjuctions. [2018-06-18 16:54:32,431 WARN ]: expecting exponential blowup for input size 13 [2018-06-18 16:54:32,649 WARN ]: Simplifying disjunction of 10368 conjuctions. This might take some time... [2018-06-18 16:54:59,554 INFO ]: Simplified to disjunction of 10368 conjuctions. [2018-06-18 16:55:07,068 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 22 [2018-06-18 16:55:07,194 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:55:07,227 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:55:07,227 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 16:55:07,227 INFO ]: Interpolant automaton has 8 states [2018-06-18 16:55:07,228 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 16:55:07,228 INFO ]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-06-18 16:55:07,228 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 16:55:07,511 WARN ]: Spent 235.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2018-06-18 16:55:07,699 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:55:07,699 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:55:07,701 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:55:07,701 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 16:55:07,701 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:55:07,702 INFO ]: With dead ends: 15 [2018-06-18 16:55:07,702 INFO ]: Without dead ends: 15 [2018-06-18 16:55:07,703 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-18 16:55:07,703 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:55:07,705 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:55:07,705 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:55:07,706 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:55:07,706 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:55:07,706 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:55:07,706 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:55:07,706 INFO ]: Interpolant automaton has 8 states. [2018-06-18 16:55:07,706 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:55:07,707 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:55:07,707 INFO ]: Found error trace [2018-06-18 16:55:07,707 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:55:07,707 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:55:07,707 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 16:55:07,707 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:55:07,707 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:55:07,708 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:55:07,708 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:55:07,708 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:55:07,798 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:55:07,800 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:55:08,500 WARN ]: Spent 441.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2018-06-18 16:55:08,721 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 83 [2018-06-18 16:55:09,031 WARN ]: Spent 246.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2018-06-18 16:55:09,062 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:55:09,062 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:55:09,062 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 16:55:09,077 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:55:09,159 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:55:09,159 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:55:09,166 INFO ]: Computing forward predicates... [2018-06-18 16:55:09,198 WARN ]: expecting exponential blowup for input size 15 [2018-06-18 16:55:10,880 WARN ]: Simplifying disjunction of 93312 conjuctions. This might take some time... Received shutdown request... [2018-06-18 16:55:27,020 INFO ]: Timeout while computing interpolants [2018-06-18 16:55:27,221 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:55:27,221 WARN ]: Verification canceled [2018-06-18 16:55:27,225 WARN ]: Timeout [2018-06-18 16:55:27,226 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 04:55:27 BoogieIcfgContainer [2018-06-18 16:55:27,226 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 16:55:27,226 INFO ]: Toolchain (without parser) took 72633.05 ms. Allocated memory was 304.1 MB in the beginning and 833.1 MB in the end (delta: 529.0 MB). Free memory was 250.5 MB in the beginning and 606.3 MB in the end (delta: -355.8 MB). Peak memory consumption was 567.9 MB. Max. memory is 3.6 GB. [2018-06-18 16:55:27,227 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 304.1 MB. Free memory is still 268.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 16:55:27,228 INFO ]: ChcToBoogie took 146.13 ms. Allocated memory is still 304.1 MB. Free memory was 250.5 MB in the beginning and 246.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:55:27,228 INFO ]: Boogie Preprocessor took 66.09 ms. Allocated memory is still 304.1 MB. Free memory is still 246.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 16:55:27,229 INFO ]: RCFGBuilder took 398.16 ms. Allocated memory is still 304.1 MB. Free memory was 246.5 MB in the beginning and 228.5 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:55:27,229 INFO ]: TraceAbstraction took 72001.85 ms. Allocated memory was 304.1 MB in the beginning and 833.1 MB in the end (delta: 529.0 MB). Free memory was 228.5 MB in the beginning and 606.3 MB in the end (delta: -377.8 MB). Peak memory consumption was 545.9 MB. Max. memory is 3.6 GB. [2018-06-18 16:55:27,232 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 304.1 MB. Free memory is still 268.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 146.13 ms. Allocated memory is still 304.1 MB. Free memory was 250.5 MB in the beginning and 246.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 66.09 ms. Allocated memory is still 304.1 MB. Free memory is still 246.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 398.16 ms. Allocated memory is still 304.1 MB. Free memory was 246.5 MB in the beginning and 228.5 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 72001.85 ms. Allocated memory was 304.1 MB in the beginning and 833.1 MB in the end (delta: 529.0 MB). Free memory was 228.5 MB in the beginning and 606.3 MB in the end (delta: -377.8 MB). Peak memory consumption was 545.9 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 analyzing trace of length 18 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was XNF transformer was simplifying 93312 conjuctions. . - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 71.9s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 22 SDtfs, 6 SDslu, 53 SDs, 0 SdLazy, 37 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 51.2s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 2736 SizeOfPredicates, 36 NumberOfNonLiveVariables, 330 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 2/6 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/SYNAPSE_5_e7_1138_e8_809.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_16-55-27-251.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/SYNAPSE_5_e7_1138_e8_809.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_16-55-27-251.csv Completed graceful shutdown