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/cav12/s3_srvr_2.cil.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 12:56:00,883 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 12:56:00,885 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 12:56:00,904 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 12:56:00,904 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 12:56:00,905 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 12:56:00,906 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 12:56:00,909 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 12:56:00,911 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 12:56:00,912 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 12:56:00,913 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 12:56:00,914 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 12:56:00,914 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 12:56:00,915 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 12:56:00,918 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 12:56:00,919 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 12:56:00,921 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 12:56:00,930 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 12:56:00,932 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 12:56:00,933 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 12:56:00,934 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 12:56:00,938 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 12:56:00,938 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 12:56:00,939 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 12:56:00,939 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 12:56:00,940 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 12:56:00,941 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 12:56:00,942 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 12:56:00,943 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 12:56:00,943 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 12:56:00,943 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 12:56:00,944 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 12:56:00,944 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 12:56:00,945 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 12:56:00,946 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 12:56:00,946 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 12:56:00,966 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 12:56:00,966 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 12:56:00,967 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 12:56:00,967 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 12:56:00,971 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 12:56:00,971 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 12:56:00,971 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 12:56:00,972 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 12:56:00,972 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 12:56:00,972 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 12:56:00,972 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 12:56:00,972 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 12:56:00,973 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 12:56:00,973 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 12:56:00,973 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 12:56:00,973 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 12:56:00,973 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 12:56:00,976 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 12:56:00,976 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 12:56:01,033 INFO ]: Repository-Root is: /tmp [2018-06-18 12:56:01,051 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 12:56:01,055 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 12:56:01,056 INFO ]: Initializing SmtParser... [2018-06-18 12:56:01,057 INFO ]: SmtParser initialized [2018-06-18 12:56:01,057 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_2.cil.smt2 [2018-06-18 12:56:01,058 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 12:56:01,139 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_2.cil.smt2 unknown [2018-06-18 12:56:01,652 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/s3_srvr_2.cil.smt2 [2018-06-18 12:56:01,656 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 12:56:01,662 INFO ]: Walking toolchain with 4 elements. [2018-06-18 12:56:01,662 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 12:56:01,663 INFO ]: Initializing ChcToBoogie... [2018-06-18 12:56:01,663 INFO ]: ChcToBoogie initialized [2018-06-18 12:56:01,670 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:56:01" (1/1) ... [2018-06-18 12:56:02,313 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:56:02 Unit [2018-06-18 12:56:02,314 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 12:56:02,314 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 12:56:02,314 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 12:56:02,314 INFO ]: Boogie Preprocessor initialized [2018-06-18 12:56:02,336 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:56:02" (1/1) ... [2018-06-18 12:56:02,336 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:56:02" (1/1) ... [2018-06-18 12:56:02,378 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:56:02" (1/1) ... [2018-06-18 12:56:02,378 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:56:02" (1/1) ... [2018-06-18 12:56:02,427 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:56:02" (1/1) ... [2018-06-18 12:56:02,428 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:56:02" (1/1) ... [2018-06-18 12:56:02,442 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:56:02" (1/1) ... [2018-06-18 12:56:02,455 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 12:56:02,456 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 12:56:02,456 INFO ]: Initializing RCFGBuilder... [2018-06-18 12:56:02,457 INFO ]: RCFGBuilder initialized [2018-06-18 12:56:02,458 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:56:02" (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 12:56:02,473 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 12:56:02,473 INFO ]: Found specification of procedure False [2018-06-18 12:56:02,473 INFO ]: Found implementation of procedure False [2018-06-18 12:56:02,473 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 12:56:02,473 INFO ]: Found specification of procedure state [2018-06-18 12:56:02,473 INFO ]: Found implementation of procedure state [2018-06-18 12:56:02,473 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 12:56:02,473 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 12:56:02,473 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 12:56:03,339 INFO ]: Using library mode [2018-06-18 12:56:03,339 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:56:03 BoogieIcfgContainer [2018-06-18 12:56:03,339 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 12:56:03,341 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 12:56:03,341 INFO ]: Initializing TraceAbstraction... [2018-06-18 12:56:03,345 INFO ]: TraceAbstraction initialized [2018-06-18 12:56:03,345 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:56:01" (1/3) ... [2018-06-18 12:56:03,346 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112ee3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 12:56:03, skipping insertion in model container [2018-06-18 12:56:03,346 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:56:02" (2/3) ... [2018-06-18 12:56:03,346 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112ee3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 12:56:03, skipping insertion in model container [2018-06-18 12:56:03,347 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:56:03" (3/3) ... [2018-06-18 12:56:03,353 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 12:56:03,363 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 12:56:03,373 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 12:56:03,422 INFO ]: Using default assertion order modulation [2018-06-18 12:56:03,423 INFO ]: Interprodecural is true [2018-06-18 12:56:03,423 INFO ]: Hoare is false [2018-06-18 12:56:03,423 INFO ]: Compute interpolants for FPandBP [2018-06-18 12:56:03,423 INFO ]: Backedges is TWOTRACK [2018-06-18 12:56:03,423 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 12:56:03,423 INFO ]: Difference is false [2018-06-18 12:56:03,423 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 12:56:03,423 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 12:56:03,440 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 12:56:03,454 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 12:56:03,454 INFO ]: Found error trace [2018-06-18 12:56:03,455 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:56:03,455 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:56:03,462 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 12:56:03,464 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:56:03,465 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:56:03,517 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:56:03,517 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:56:03,518 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:56:03,565 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:56:03,575 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:56:03,772 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 12:56:03,775 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 12:56:03,775 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 12:56:03,777 INFO ]: Interpolant automaton has 4 states [2018-06-18 12:56:03,793 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 12:56:03,795 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 12:56:03,798 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 12:56:03,932 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:56:03,932 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 12:56:03,934 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 12:56:03,936 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 12:56:03,936 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:56:03,951 INFO ]: With dead ends: 13 [2018-06-18 12:56:03,951 INFO ]: Without dead ends: 13 [2018-06-18 12:56:03,956 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 12:56:03,976 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 12:56:04,012 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 12:56:04,013 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 12:56:04,014 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 12:56:04,015 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 12:56:04,016 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:56:04,016 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 12:56:04,017 INFO ]: Interpolant automaton has 4 states. [2018-06-18 12:56:04,017 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 12:56:04,018 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 12:56:04,018 INFO ]: Found error trace [2018-06-18 12:56:04,018 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:56:04,018 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:56:04,019 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 12:56:04,019 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:56:04,019 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:56:04,020 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:56:04,020 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:56:04,020 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:56:04,161 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:56:04,162 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:56:04,542 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:56:04,542 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:56:04,542 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 12:56:04,551 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:56:04,669 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:56:04,686 INFO ]: Computing forward predicates... [2018-06-18 12:56:05,744 WARN ]: Spent 505.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-18 12:56:05,898 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:56:05,977 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:56:05,977 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 12:56:05,978 INFO ]: Interpolant automaton has 8 states [2018-06-18 12:56:05,978 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 12:56:05,978 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-18 12:56:05,978 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 12:56:06,396 WARN ]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-18 12:56:06,550 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:56:06,550 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 12:56:06,551 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 12:56:06,551 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 12:56:06,551 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:56:06,552 INFO ]: With dead ends: 15 [2018-06-18 12:56:06,552 INFO ]: Without dead ends: 15 [2018-06-18 12:56:06,553 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-06-18 12:56:06,553 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 12:56:06,558 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 12:56:06,558 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 12:56:06,559 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 12:56:06,559 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 12:56:06,559 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:56:06,559 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 12:56:06,559 INFO ]: Interpolant automaton has 8 states. [2018-06-18 12:56:06,559 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 12:56:06,559 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 12:56:06,559 INFO ]: Found error trace [2018-06-18 12:56:06,559 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:56:06,560 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:56:06,560 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 12:56:06,560 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:56:06,560 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:56:06,561 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:56:06,561 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:56:06,561 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:56:06,675 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:56:06,676 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:56:07,077 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 12:56:07,077 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:56:07,077 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 12:56:07,083 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 12:56:07,194 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 12:56:07,194 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:56:07,204 INFO ]: Computing forward predicates... [2018-06-18 12:56:08,267 WARN ]: Spent 419.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-06-18 12:56:08,303 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 12:56:08,325 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:56:08,325 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-18 12:56:08,325 INFO ]: Interpolant automaton has 12 states [2018-06-18 12:56:08,325 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-18 12:56:08,326 INFO ]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-06-18 12:56:08,326 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-18 12:56:08,699 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:56:08,699 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 12:56:08,699 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 12:56:08,699 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-18 12:56:08,699 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:56:08,700 INFO ]: With dead ends: 17 [2018-06-18 12:56:08,700 INFO ]: Without dead ends: 17 [2018-06-18 12:56:08,700 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2018-06-18 12:56:08,700 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 12:56:08,704 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 12:56:08,704 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 12:56:08,704 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 12:56:08,704 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 12:56:08,704 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:56:08,704 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 12:56:08,704 INFO ]: Interpolant automaton has 12 states. [2018-06-18 12:56:08,704 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 12:56:08,705 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 12:56:08,705 INFO ]: Found error trace [2018-06-18 12:56:08,705 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:56:08,705 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:56:08,705 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-18 12:56:08,705 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:56:08,705 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:56:08,707 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:56:08,707 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:56:08,707 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:56:08,839 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:56:08,840 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:56:09,267 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 12:56:09,267 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:56:09,267 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 12:56:09,278 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 12:56:09,421 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 12:56:09,421 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:56:09,435 INFO ]: Computing forward predicates... [2018-06-18 12:56:10,739 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2018-06-18 12:56:11,684 WARN ]: Spent 501.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2018-06-18 12:56:11,768 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 12:56:11,804 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:56:11,804 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-18 12:56:11,804 INFO ]: Interpolant automaton has 16 states [2018-06-18 12:56:11,804 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-18 12:56:11,804 INFO ]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-06-18 12:56:11,804 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-18 12:56:12,942 WARN ]: Spent 767.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2018-06-18 12:56:13,251 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2018-06-18 12:56:13,469 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:56:13,469 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-18 12:56:13,469 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 12:56:13,469 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-18 12:56:13,469 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:56:13,470 INFO ]: With dead ends: 21 [2018-06-18 12:56:13,470 INFO ]: Without dead ends: 21 [2018-06-18 12:56:13,470 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2018-06-18 12:56:13,470 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-18 12:56:13,474 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-18 12:56:13,474 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-18 12:56:13,474 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-18 12:56:13,474 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 21 [2018-06-18 12:56:13,475 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:56:13,475 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-18 12:56:13,475 INFO ]: Interpolant automaton has 16 states. [2018-06-18 12:56:13,475 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-18 12:56:13,475 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-18 12:56:13,475 INFO ]: Found error trace [2018-06-18 12:56:13,475 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:56:13,476 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:56:13,476 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 4 times [2018-06-18 12:56:13,476 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:56:13,476 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:56:13,476 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:56:13,476 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:56:13,477 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:56:13,694 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:56:13,696 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:56:14,219 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-18 12:56:14,455 WARN ]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-18 12:56:14,743 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2018-06-18 12:56:15,007 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 26 [2018-06-18 12:56:15,258 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 12:56:15,259 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:56:15,259 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 12:56:15,273 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 12:56:15,459 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 12:56:15,459 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:56:15,491 INFO ]: Computing forward predicates... [2018-06-18 12:56:16,991 WARN ]: Spent 468.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2018-06-18 12:56:18,027 WARN ]: Spent 655.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2018-06-18 12:56:24,997 WARN ]: Spent 6.25 s on a formula simplification. DAG size of input: 338 DAG size of output: 154 [2018-06-18 12:56:26,059 WARN ]: Spent 321.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 26 [2018-06-18 12:56:26,293 INFO ]: Checked inductivity of 55 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 12:56:26,327 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:56:26,327 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2018-06-18 12:56:26,327 INFO ]: Interpolant automaton has 23 states [2018-06-18 12:56:26,327 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-18 12:56:26,328 INFO ]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2018-06-18 12:56:26,328 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 23 states. [2018-06-18 12:56:29,575 WARN ]: Spent 3.16 s on a formula simplification. DAG size of input: 184 DAG size of output: 169 [2018-06-18 12:56:30,864 WARN ]: Spent 1.02 s on a formula simplification. DAG size of input: 182 DAG size of output: 121 [2018-06-18 12:56:32,437 WARN ]: Spent 1.51 s on a formula simplification. DAG size of input: 184 DAG size of output: 122 [2018-06-18 12:56:34,029 WARN ]: Spent 1.37 s on a formula simplification. DAG size of input: 185 DAG size of output: 137 [2018-06-18 12:56:39,133 WARN ]: Spent 5.02 s on a formula simplification. DAG size of input: 184 DAG size of output: 158 [2018-06-18 12:56:43,261 WARN ]: Spent 4.07 s on a formula simplification. DAG size of input: 184 DAG size of output: 165 [2018-06-18 12:56:43,349 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:56:43,349 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-18 12:56:43,350 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-18 12:56:43,350 INFO ]: Start accepts. Automaton has 23 states. Word has length 29 [2018-06-18 12:56:43,350 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:56:43,351 INFO ]: With dead ends: 23 [2018-06-18 12:56:43,351 INFO ]: Without dead ends: 23 [2018-06-18 12:56:43,351 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2018-06-18 12:56:43,351 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-18 12:56:43,355 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-18 12:56:43,355 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-18 12:56:43,355 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-18 12:56:43,356 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-18 12:56:43,356 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:56:43,356 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-18 12:56:43,356 INFO ]: Interpolant automaton has 23 states. [2018-06-18 12:56:43,356 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-18 12:56:43,357 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-18 12:56:43,357 INFO ]: Found error trace [2018-06-18 12:56:43,357 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:56:43,357 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:56:43,357 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 5 times [2018-06-18 12:56:43,357 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:56:43,357 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:56:43,358 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:56:43,358 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:56:43,358 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:56:43,584 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:56:43,586 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:56:44,387 WARN ]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-18 12:56:44,706 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2018-06-18 12:56:44,971 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 19 [2018-06-18 12:56:45,336 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 12:56:45,336 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:56:45,336 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 12:56:45,344 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 12:56:45,538 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-06-18 12:56:45,538 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:56:45,556 INFO ]: Computing forward predicates... [2018-06-18 12:56:46,757 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2018-06-18 12:56:50,836 WARN ]: Spent 3.32 s on a formula simplification. DAG size of input: 286 DAG size of output: 155 [2018-06-18 12:56:56,044 WARN ]: Spent 4.61 s on a formula simplification. DAG size of input: 320 DAG size of output: 180 [2018-06-18 12:56:56,684 WARN ]: Spent 277.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 25 [2018-06-18 12:56:56,861 INFO ]: Checked inductivity of 78 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 12:56:56,884 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:56:56,884 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2018-06-18 12:56:56,884 INFO ]: Interpolant automaton has 27 states [2018-06-18 12:56:56,884 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-18 12:56:56,885 INFO ]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2018-06-18 12:56:56,885 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 27 states. [2018-06-18 12:56:59,691 WARN ]: Spent 2.73 s on a formula simplification. DAG size of input: 247 DAG size of output: 196 [2018-06-18 12:57:00,254 WARN ]: Spent 441.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 42 [2018-06-18 12:57:00,756 WARN ]: Spent 421.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 40 [2018-06-18 12:57:02,034 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 247 DAG size of output: 148 [2018-06-18 12:57:03,607 WARN ]: Spent 1.35 s on a formula simplification. DAG size of input: 248 DAG size of output: 162 Received shutdown request... [2018-06-18 12:57:04,705 WARN ]: Removed 2 from assertion stack [2018-06-18 12:57:04,705 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 12:57:04,705 WARN ]: Verification canceled [2018-06-18 12:57:04,709 WARN ]: Timeout [2018-06-18 12:57:04,709 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 12:57:04 BoogieIcfgContainer [2018-06-18 12:57:04,709 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 12:57:04,710 INFO ]: Toolchain (without parser) took 63053.16 ms. Allocated memory was 308.8 MB in the beginning and 1.0 GB in the end (delta: 740.3 MB). Free memory was 243.4 MB in the beginning and 302.2 MB in the end (delta: -58.8 MB). Peak memory consumption was 681.5 MB. Max. memory is 3.6 GB. [2018-06-18 12:57:04,711 INFO ]: SmtParser took 0.05 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 12:57:04,711 INFO ]: ChcToBoogie took 651.55 ms. Allocated memory was 308.8 MB in the beginning and 335.0 MB in the end (delta: 26.2 MB). Free memory was 243.4 MB in the beginning and 227.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 65.2 MB. Max. memory is 3.6 GB. [2018-06-18 12:57:04,711 INFO ]: Boogie Preprocessor took 140.63 ms. Allocated memory is still 335.0 MB. Free memory was 227.9 MB in the beginning and 219.1 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 3.6 GB. [2018-06-18 12:57:04,714 INFO ]: RCFGBuilder took 883.95 ms. Allocated memory was 335.0 MB in the beginning and 385.9 MB in the end (delta: 50.9 MB). Free memory was 219.1 MB in the beginning and 305.3 MB in the end (delta: -86.2 MB). Peak memory consumption was 47.8 MB. Max. memory is 3.6 GB. [2018-06-18 12:57:04,715 INFO ]: TraceAbstraction took 61368.37 ms. Allocated memory was 385.9 MB in the beginning and 1.0 GB in the end (delta: 663.2 MB). Free memory was 305.3 MB in the beginning and 302.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 666.3 MB. Max. memory is 3.6 GB. [2018-06-18 12:57:04,717 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.05 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 651.55 ms. Allocated memory was 308.8 MB in the beginning and 335.0 MB in the end (delta: 26.2 MB). Free memory was 243.4 MB in the beginning and 227.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 65.2 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 140.63 ms. Allocated memory is still 335.0 MB. Free memory was 227.9 MB in the beginning and 219.1 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.8 MB. Max. memory is 3.6 GB. * RCFGBuilder took 883.95 ms. Allocated memory was 335.0 MB in the beginning and 385.9 MB in the end (delta: 50.9 MB). Free memory was 219.1 MB in the beginning and 305.3 MB in the end (delta: -86.2 MB). Peak memory consumption was 47.8 MB. Max. memory is 3.6 GB. * TraceAbstraction took 61368.37 ms. Allocated memory was 385.9 MB in the beginning and 1.0 GB in the end (delta: 663.2 MB). Free memory was 305.3 MB in the beginning and 302.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 666.3 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (23states) and interpolant automaton (currently 9 states, 27 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 247. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 61.2s OverallTime, 6 OverallIterations, 7 TraceHistogramMax, 27.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 150 SDslu, 239 SDs, 0 SdLazy, 219 SolverSat, 192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 189 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 48.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 31.5s InterpolantComputationTime, 235 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 224 ConstructedInterpolants, 0 QuantifiedInterpolants, 136260 SizeOfPredicates, 2351 NumberOfNonLiveVariables, 2133 ConjunctsInSsa, 108 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 101/334 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/s3_srvr_2.cil.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_12-57-04-733.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/s3_srvr_2.cil.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_12-57-04-733.csv Completed graceful shutdown