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/mem_slave_tlm.4.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 12:48:41,991 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 12:48:41,993 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 12:48:42,008 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 12:48:42,008 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 12:48:42,010 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 12:48:42,011 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 12:48:42,013 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 12:48:42,014 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 12:48:42,015 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 12:48:42,016 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 12:48:42,017 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 12:48:42,018 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 12:48:42,019 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 12:48:42,019 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 12:48:42,019 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 12:48:42,023 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 12:48:42,033 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 12:48:42,034 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 12:48:42,035 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 12:48:42,036 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 12:48:42,037 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 12:48:42,040 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 12:48:42,041 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 12:48:42,041 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 12:48:42,042 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 12:48:42,043 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 12:48:42,043 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 12:48:42,047 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 12:48:42,047 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 12:48:42,047 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 12:48:42,048 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 12:48:42,048 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 12:48:42,049 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 12:48:42,049 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 12:48:42,053 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 12:48:42,075 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 12:48:42,075 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 12:48:42,075 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 12:48:42,076 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 12:48:42,080 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 12:48:42,080 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 12:48:42,080 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 12:48:42,080 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 12:48:42,080 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 12:48:42,081 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 12:48:42,081 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 12:48:42,081 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 12:48:42,081 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 12:48:42,081 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 12:48:42,081 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 12:48:42,082 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 12:48:42,082 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 12:48:42,085 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 12:48:42,085 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 12:48:42,134 INFO ]: Repository-Root is: /tmp [2018-06-18 12:48:42,148 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 12:48:42,151 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 12:48:42,152 INFO ]: Initializing SmtParser... [2018-06-18 12:48:42,153 INFO ]: SmtParser initialized [2018-06-18 12:48:42,153 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/mem_slave_tlm.4.smt2 [2018-06-18 12:48:42,155 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 12:48:42,244 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/mem_slave_tlm.4.smt2 unknown [2018-06-18 12:48:43,242 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/mem_slave_tlm.4.smt2 [2018-06-18 12:48:43,247 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 12:48:43,252 INFO ]: Walking toolchain with 4 elements. [2018-06-18 12:48:43,252 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 12:48:43,253 INFO ]: Initializing ChcToBoogie... [2018-06-18 12:48:43,253 INFO ]: ChcToBoogie initialized [2018-06-18 12:48:43,260 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:48:43" (1/1) ... [2018-06-18 12:48:43,457 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:48:43 Unit [2018-06-18 12:48:43,458 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 12:48:43,458 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 12:48:43,458 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 12:48:43,458 INFO ]: Boogie Preprocessor initialized [2018-06-18 12:48:43,480 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:48:43" (1/1) ... [2018-06-18 12:48:43,480 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:48:43" (1/1) ... [2018-06-18 12:48:43,513 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:48:43" (1/1) ... [2018-06-18 12:48:43,513 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:48:43" (1/1) ... [2018-06-18 12:48:43,548 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:48:43" (1/1) ... [2018-06-18 12:48:43,550 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:48:43" (1/1) ... [2018-06-18 12:48:43,557 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:48:43" (1/1) ... [2018-06-18 12:48:43,566 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 12:48:43,567 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 12:48:43,567 INFO ]: Initializing RCFGBuilder... [2018-06-18 12:48:43,567 INFO ]: RCFGBuilder initialized [2018-06-18 12:48:43,568 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:48:43" (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 12:48:43,585 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 12:48:43,585 INFO ]: Found specification of procedure False [2018-06-18 12:48:43,585 INFO ]: Found implementation of procedure False [2018-06-18 12:48:43,585 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 12:48:43,585 INFO ]: Found specification of procedure state [2018-06-18 12:48:43,585 INFO ]: Found implementation of procedure state [2018-06-18 12:48:43,585 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 12:48:43,586 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 12:48:43,586 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 12:48:44,294 INFO ]: Using library mode [2018-06-18 12:48:44,294 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:48:44 BoogieIcfgContainer [2018-06-18 12:48:44,294 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 12:48:44,297 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 12:48:44,297 INFO ]: Initializing TraceAbstraction... [2018-06-18 12:48:44,301 INFO ]: TraceAbstraction initialized [2018-06-18 12:48:44,301 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:48:43" (1/3) ... [2018-06-18 12:48:44,302 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34dbbb17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 12:48:44, skipping insertion in model container [2018-06-18 12:48:44,302 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:48:43" (2/3) ... [2018-06-18 12:48:44,302 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34dbbb17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 12:48:44, skipping insertion in model container [2018-06-18 12:48:44,302 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:48:44" (3/3) ... [2018-06-18 12:48:44,304 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 12:48:44,315 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 12:48:44,322 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 12:48:44,366 INFO ]: Using default assertion order modulation [2018-06-18 12:48:44,367 INFO ]: Interprodecural is true [2018-06-18 12:48:44,367 INFO ]: Hoare is false [2018-06-18 12:48:44,367 INFO ]: Compute interpolants for FPandBP [2018-06-18 12:48:44,367 INFO ]: Backedges is TWOTRACK [2018-06-18 12:48:44,367 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 12:48:44,367 INFO ]: Difference is false [2018-06-18 12:48:44,367 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 12:48:44,367 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 12:48:44,391 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 12:48:44,401 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 12:48:44,401 INFO ]: Found error trace [2018-06-18 12:48:44,402 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:48:44,403 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:48:44,406 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 12:48:44,408 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:48:44,408 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:48:44,453 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:48:44,453 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:48:44,453 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:48:44,504 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:48:44,514 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:48:44,716 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 12:48:44,719 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 12:48:44,719 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 12:48:44,721 INFO ]: Interpolant automaton has 4 states [2018-06-18 12:48:44,737 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 12:48:44,738 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 12:48:44,740 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 12:48:44,926 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:48:44,926 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 12:48:44,928 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 12:48:44,930 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 12:48:44,930 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:48:44,945 INFO ]: With dead ends: 13 [2018-06-18 12:48:44,945 INFO ]: Without dead ends: 13 [2018-06-18 12:48:44,947 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 12:48:44,967 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 12:48:45,007 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 12:48:45,009 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 12:48:45,010 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 12:48:45,011 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 12:48:45,011 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:48:45,011 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 12:48:45,011 INFO ]: Interpolant automaton has 4 states. [2018-06-18 12:48:45,011 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 12:48:45,013 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 12:48:45,013 INFO ]: Found error trace [2018-06-18 12:48:45,013 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:48:45,013 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:48:45,014 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 12:48:45,014 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:48:45,014 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:48:45,015 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:48:45,015 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:48:45,015 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:48:45,268 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:48:45,269 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:48:45,631 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:48:45,631 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:48:45,631 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 12:48:45,642 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:48:45,813 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:48:45,828 INFO ]: Computing forward predicates... [2018-06-18 12:48:47,895 WARN ]: Spent 1.65 s on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2018-06-18 12:48:48,081 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:48:48,108 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:48:48,108 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 12:48:48,108 INFO ]: Interpolant automaton has 9 states [2018-06-18 12:48:48,109 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 12:48:48,109 INFO ]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-18 12:48:48,109 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 12:48:48,689 WARN ]: Spent 446.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2018-06-18 12:48:48,848 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2018-06-18 12:48:48,875 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:48:48,875 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 12:48:48,875 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 12:48:48,876 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 12:48:48,876 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:48:48,876 INFO ]: With dead ends: 15 [2018-06-18 12:48:48,876 INFO ]: Without dead ends: 15 [2018-06-18 12:48:48,877 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-06-18 12:48:48,877 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 12:48:48,880 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 12:48:48,880 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 12:48:48,880 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 12:48:48,880 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 12:48:48,880 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:48:48,880 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 12:48:48,880 INFO ]: Interpolant automaton has 9 states. [2018-06-18 12:48:48,880 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 12:48:48,881 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 12:48:48,881 INFO ]: Found error trace [2018-06-18 12:48:48,881 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:48:48,881 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:48:48,881 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 12:48:48,881 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:48:48,881 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:48:48,882 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:48:48,882 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:48:48,882 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:48:49,097 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:48:49,098 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:48:49,529 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2018-06-18 12:48:49,749 WARN ]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-18 12:48:49,960 WARN ]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-18 12:48:49,997 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 12:48:49,998 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:48:49,998 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 12:48:50,007 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 12:48:50,177 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 12:48:50,177 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:48:50,188 INFO ]: Computing forward predicates... [2018-06-18 12:48:50,532 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2018-06-18 12:48:51,537 WARN ]: Spent 795.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2018-06-18 12:48:51,767 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 12:48:51,788 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:48:51,788 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-18 12:48:51,789 INFO ]: Interpolant automaton has 12 states [2018-06-18 12:48:51,789 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-18 12:48:51,789 INFO ]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-06-18 12:48:51,789 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-18 12:48:52,465 WARN ]: Spent 600.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2018-06-18 12:48:52,595 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2018-06-18 12:48:53,132 WARN ]: Spent 511.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2018-06-18 12:48:53,171 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:48:53,171 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 12:48:53,171 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 12:48:53,171 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-18 12:48:53,172 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:48:53,172 INFO ]: With dead ends: 17 [2018-06-18 12:48:53,172 INFO ]: Without dead ends: 17 [2018-06-18 12:48:53,172 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-06-18 12:48:53,173 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 12:48:53,176 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 12:48:53,176 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 12:48:53,176 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 12:48:53,176 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 12:48:53,176 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:48:53,176 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 12:48:53,176 INFO ]: Interpolant automaton has 12 states. [2018-06-18 12:48:53,176 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 12:48:53,177 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 12:48:53,177 INFO ]: Found error trace [2018-06-18 12:48:53,177 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:48:53,177 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:48:53,177 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-18 12:48:53,177 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:48:53,177 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:48:53,178 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:48:53,178 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:48:53,178 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:48:53,444 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:48:53,445 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:48:54,113 WARN ]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-18 12:48:54,326 WARN ]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-18 12:48:54,373 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 12:48:54,373 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:48:54,373 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 12:48:54,387 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 12:48:54,572 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 12:48:54,572 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:48:54,585 INFO ]: Computing forward predicates... [2018-06-18 12:48:54,989 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2018-06-18 12:48:56,431 WARN ]: Spent 1.07 s on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2018-06-18 12:48:57,541 WARN ]: Spent 880.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-06-18 12:48:57,665 INFO ]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 12:48:57,686 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:48:57,686 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-06-18 12:48:57,687 INFO ]: Interpolant automaton has 15 states [2018-06-18 12:48:57,687 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-18 12:48:57,687 INFO ]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-06-18 12:48:57,687 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 15 states. [2018-06-18 12:48:58,014 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 22 [2018-06-18 12:48:58,632 WARN ]: Spent 584.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2018-06-18 12:48:58,668 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:48:58,668 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 12:48:58,670 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 12:48:58,670 INFO ]: Start accepts. Automaton has 15 states. Word has length 21 [2018-06-18 12:48:58,670 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:48:58,671 INFO ]: With dead ends: 19 [2018-06-18 12:48:58,671 INFO ]: Without dead ends: 19 [2018-06-18 12:48:58,671 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2018-06-18 12:48:58,671 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 12:48:58,674 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 12:48:58,674 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 12:48:58,674 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 12:48:58,675 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 12:48:58,675 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:48:58,675 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 12:48:58,675 INFO ]: Interpolant automaton has 15 states. [2018-06-18 12:48:58,675 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 12:48:58,675 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 12:48:58,675 INFO ]: Found error trace [2018-06-18 12:48:58,675 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:48:58,676 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:48:58,676 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-18 12:48:58,676 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:48:58,676 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:48:58,678 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:48:58,678 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:48:58,678 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:48:59,013 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:48:59,014 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:48:59,659 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2018-06-18 12:48:59,871 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2018-06-18 12:49:00,015 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 12:49:00,015 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:49:00,015 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 12:49:00,021 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 12:49:00,264 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 12:49:00,264 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:49:00,284 INFO ]: Computing forward predicates... [2018-06-18 12:49:00,771 WARN ]: Spent 402.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2018-06-18 12:49:02,404 WARN ]: Spent 1.34 s on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2018-06-18 12:49:04,925 WARN ]: Spent 2.37 s on a formula simplification. DAG size of input: 128 DAG size of output: 119 [2018-06-18 12:49:07,137 WARN ]: Spent 2.01 s on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2018-06-18 12:49:07,332 INFO ]: Checked inductivity of 36 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 12:49:07,354 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:49:07,354 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2018-06-18 12:49:07,355 INFO ]: Interpolant automaton has 20 states [2018-06-18 12:49:07,355 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-18 12:49:07,355 INFO ]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2018-06-18 12:49:07,355 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-18 12:49:07,662 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 26 [2018-06-18 12:49:07,868 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 31 [2018-06-18 12:49:08,323 WARN ]: Spent 386.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 69 [2018-06-18 12:49:09,688 WARN ]: Spent 1.32 s on a formula simplification. DAG size of input: 121 DAG size of output: 107 [2018-06-18 12:49:09,817 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:49:09,817 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-18 12:49:09,818 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 12:49:09,818 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-18 12:49:09,818 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:49:09,818 INFO ]: With dead ends: 21 [2018-06-18 12:49:09,818 INFO ]: Without dead ends: 21 [2018-06-18 12:49:09,819 INFO ]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2018-06-18 12:49:09,819 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-18 12:49:09,822 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-18 12:49:09,822 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-18 12:49:09,823 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-18 12:49:09,823 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-18 12:49:09,823 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:49:09,823 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-18 12:49:09,823 INFO ]: Interpolant automaton has 20 states. [2018-06-18 12:49:09,823 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-18 12:49:09,824 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-18 12:49:09,824 INFO ]: Found error trace [2018-06-18 12:49:09,824 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:49:09,824 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:49:09,824 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-18 12:49:09,824 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:49:09,824 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:49:09,825 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:49:09,825 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:49:09,825 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:49:10,153 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:49:10,154 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:49:10,988 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2018-06-18 12:49:11,194 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2018-06-18 12:49:11,476 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 12:49:11,476 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:49:11,476 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 12:49:11,482 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 12:49:11,824 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-18 12:49:11,824 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:49:11,850 INFO ]: Computing forward predicates... [2018-06-18 12:49:12,365 WARN ]: Spent 395.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2018-06-18 12:49:13,395 WARN ]: Spent 914.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2018-06-18 12:49:15,079 WARN ]: Spent 1.58 s on a formula simplification. DAG size of input: 111 DAG size of output: 87 [2018-06-18 12:49:16,922 WARN ]: Spent 1.71 s on a formula simplification. DAG size of input: 128 DAG size of output: 119 [2018-06-18 12:49:19,070 WARN ]: Spent 2.02 s on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2018-06-18 12:49:19,485 INFO ]: Checked inductivity of 55 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 12:49:19,523 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:49:19,523 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2018-06-18 12:49:19,523 INFO ]: Interpolant automaton has 24 states [2018-06-18 12:49:19,523 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-18 12:49:19,524 INFO ]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2018-06-18 12:49:19,524 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-18 12:49:19,957 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 26 [2018-06-18 12:49:20,168 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 31 [2018-06-18 12:49:20,515 WARN ]: Spent 287.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 61 [2018-06-18 12:49:20,966 WARN ]: Spent 404.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 52 [2018-06-18 12:49:22,193 WARN ]: Spent 1.17 s on a formula simplification. DAG size of input: 123 DAG size of output: 106 [2018-06-18 12:49:22,405 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:49:22,405 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-18 12:49:22,406 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-18 12:49:22,406 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-18 12:49:22,406 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:49:22,407 INFO ]: With dead ends: 23 [2018-06-18 12:49:22,407 INFO ]: Without dead ends: 23 [2018-06-18 12:49:22,407 INFO ]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2018-06-18 12:49:22,407 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-18 12:49:22,410 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-18 12:49:22,411 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-18 12:49:22,411 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-18 12:49:22,411 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-18 12:49:22,412 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:49:22,412 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-18 12:49:22,412 INFO ]: Interpolant automaton has 24 states. [2018-06-18 12:49:22,412 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-18 12:49:22,412 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-18 12:49:22,412 INFO ]: Found error trace [2018-06-18 12:49:22,413 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:49:22,413 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:49:22,413 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-18 12:49:22,413 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:49:22,413 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:49:22,413 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:49:22,413 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:49:22,413 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:49:23,079 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:49:23,087 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:49:24,177 WARN ]: Spent 423.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2018-06-18 12:49:24,550 WARN ]: Spent 359.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2018-06-18 12:49:24,834 WARN ]: Spent 268.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2018-06-18 12:49:25,389 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 20 [2018-06-18 12:49:25,408 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 12:49:25,408 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:49:25,408 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 12:49:25,414 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-18 12:49:25,872 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-18 12:49:25,872 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:49:25,898 INFO ]: Computing forward predicates... [2018-06-18 12:49:26,486 WARN ]: Spent 409.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2018-06-18 12:49:27,631 WARN ]: Spent 998.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2018-06-18 12:49:29,630 WARN ]: Spent 1.78 s on a formula simplification. DAG size of input: 108 DAG size of output: 98 [2018-06-18 12:49:32,330 WARN ]: Spent 2.54 s on a formula simplification. DAG size of input: 146 DAG size of output: 121 [2018-06-18 12:49:35,875 WARN ]: Spent 3.36 s on a formula simplification. DAG size of input: 158 DAG size of output: 145 [2018-06-18 12:49:38,372 WARN ]: Spent 2.36 s on a formula simplification. DAG size of input: 136 DAG size of output: 118 [2018-06-18 12:49:39,150 INFO ]: Checked inductivity of 78 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 12:49:39,175 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:49:39,175 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2018-06-18 12:49:39,175 INFO ]: Interpolant automaton has 28 states [2018-06-18 12:49:39,176 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-18 12:49:39,176 INFO ]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2018-06-18 12:49:39,176 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 28 states. Received shutdown request... [2018-06-18 12:49:43,282 WARN ]: Removed 7 from assertion stack [2018-06-18 12:49:43,282 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 12:49:43,282 WARN ]: Verification canceled [2018-06-18 12:49:43,287 WARN ]: Timeout [2018-06-18 12:49:43,287 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 12:49:43 BoogieIcfgContainer [2018-06-18 12:49:43,287 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 12:49:43,288 INFO ]: Toolchain (without parser) took 60040.82 ms. Allocated memory was 308.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 190.9 MB in the beginning and 607.8 MB in the end (delta: -416.9 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-18 12:49:43,289 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 12:49:43,289 INFO ]: ChcToBoogie took 205.46 ms. Allocated memory was 308.3 MB in the beginning and 321.4 MB in the end (delta: 13.1 MB). Free memory was 190.9 MB in the beginning and 263.0 MB in the end (delta: -72.2 MB). Peak memory consumption was 5.3 MB. Max. memory is 3.6 GB. [2018-06-18 12:49:43,289 INFO ]: Boogie Preprocessor took 108.08 ms. Allocated memory is still 321.4 MB. Free memory was 263.0 MB in the beginning and 259.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 3.6 GB. [2018-06-18 12:49:43,290 INFO ]: RCFGBuilder took 727.38 ms. Allocated memory is still 321.4 MB. Free memory was 259.8 MB in the beginning and 185.8 MB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 3.6 GB. [2018-06-18 12:49:43,290 INFO ]: TraceAbstraction took 58990.49 ms. Allocated memory was 321.4 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 185.8 MB in the beginning and 607.8 MB in the end (delta: -422.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-18 12:49:43,292 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 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 205.46 ms. Allocated memory was 308.3 MB in the beginning and 321.4 MB in the end (delta: 13.1 MB). Free memory was 190.9 MB in the beginning and 263.0 MB in the end (delta: -72.2 MB). Peak memory consumption was 5.3 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 108.08 ms. Allocated memory is still 321.4 MB. Free memory was 263.0 MB in the beginning and 259.8 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 3.6 GB. * RCFGBuilder took 727.38 ms. Allocated memory is still 321.4 MB. Free memory was 259.8 MB in the beginning and 185.8 MB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 58990.49 ms. Allocated memory was 321.4 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 185.8 MB in the beginning and 607.8 MB in the end (delta: -422.0 MB). Peak memory consumption was 1.1 GB. 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 4 states, 28 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 225. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 58.9s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 12.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 78 SDtfs, 94 SDslu, 312 SDs, 0 SdLazy, 282 SolverSat, 110 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 221 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 43.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=6, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 3.2s SatisfiabilityAnalysisTime, 41.9s InterpolantComputationTime, 285 NumberOfCodeBlocks, 285 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 496480 SizeOfPredicates, 4949 NumberOfNonLiveVariables, 3882 ConjunctsInSsa, 226 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 133/406 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/mem_slave_tlm.4.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_12-49-43-314.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/mem_slave_tlm.4.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_12-49-43-314.csv Completed graceful shutdown