java -Xss1g -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/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/transmitter.3.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:40:32,197 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:40:32,199 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:40:32,211 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:40:32,211 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:40:32,212 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:40:32,213 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:40:32,215 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:40:32,216 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:40:32,217 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:40:32,218 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:40:32,218 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:40:32,219 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:40:32,220 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:40:32,221 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:40:32,221 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:40:32,223 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:40:32,225 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:40:32,227 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:40:32,228 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:40:32,229 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:40:32,231 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:40:32,232 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:40:32,232 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:40:32,233 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:40:32,234 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:40:32,234 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:40:32,235 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:40:32,236 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:40:32,236 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:40:32,237 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:40:32,238 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:40:32,238 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:40:32,239 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:40:32,239 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:40:32,240 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:40:32,254 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:40:32,254 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:40:32,254 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:40:32,255 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:40:32,256 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:40:32,256 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:40:32,257 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:40:32,257 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:40:32,257 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:40:32,257 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:40:32,258 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:40:32,258 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:40:32,258 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:40:32,258 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:40:32,258 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:40:32,259 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:40:32,259 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:40:32,259 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:40:32,259 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:40:32,261 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:40:32,263 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:40:32,303 INFO ]: Repository-Root is: /tmp [2018-06-22 14:40:32,320 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:40:32,325 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:40:32,327 INFO ]: Initializing SmtParser... [2018-06-22 14:40:32,327 INFO ]: SmtParser initialized [2018-06-22 14:40:32,328 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/transmitter.3.smt2 [2018-06-22 14:40:32,329 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 [2018-06-22 14:40:32,427 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/transmitter.3.smt2 unknown [2018-06-22 14:40:33,375 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/transmitter.3.smt2 [2018-06-22 14:40:33,380 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:40:33,395 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:40:33,395 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:40:33,395 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:40:33,395 INFO ]: ChcToBoogie initialized [2018-06-22 14:40:33,398 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:40:33" (1/1) ... [2018-06-22 14:40:33,485 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:40:33 Unit [2018-06-22 14:40:33,485 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:40:33,486 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:40:33,486 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:40:33,486 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:40:33,522 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:40:33" (1/1) ... [2018-06-22 14:40:33,522 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:40:33" (1/1) ... [2018-06-22 14:40:33,553 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:40:33" (1/1) ... [2018-06-22 14:40:33,553 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:40:33" (1/1) ... [2018-06-22 14:40:33,588 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:40:33" (1/1) ... [2018-06-22 14:40:33,590 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:40:33" (1/1) ... [2018-06-22 14:40:33,596 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:40:33" (1/1) ... [2018-06-22 14:40:33,603 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:40:33,603 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:40:33,603 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:40:33,603 INFO ]: RCFGBuilder initialized [2018-06-22 14:40:33,604 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:40:33" (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) [2018-06-22 14:40:33,626 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:40:33,626 INFO ]: Found specification of procedure False [2018-06-22 14:40:33,626 INFO ]: Found implementation of procedure False [2018-06-22 14:40:33,626 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:40:33,626 INFO ]: Found specification of procedure state [2018-06-22 14:40:33,626 INFO ]: Found implementation of procedure state [2018-06-22 14:40:33,626 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:40:33,626 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:40:33,626 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 [2018-06-22 14:40:34,140 INFO ]: Using library mode [2018-06-22 14:40:34,141 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:40:34 BoogieIcfgContainer [2018-06-22 14:40:34,141 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:40:34,146 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:40:34,146 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:40:34,149 INFO ]: TraceAbstraction initialized [2018-06-22 14:40:34,149 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:40:33" (1/3) ... [2018-06-22 14:40:34,150 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b6ca3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:40:34, skipping insertion in model container [2018-06-22 14:40:34,150 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:40:33" (2/3) ... [2018-06-22 14:40:34,150 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b6ca3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:40:34, skipping insertion in model container [2018-06-22 14:40:34,151 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:40:34" (3/3) ... [2018-06-22 14:40:34,155 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:40:34,165 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:40:34,176 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:40:34,229 INFO ]: Using default assertion order modulation [2018-06-22 14:40:34,229 INFO ]: Interprodecural is true [2018-06-22 14:40:34,229 INFO ]: Hoare is false [2018-06-22 14:40:34,229 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:40:34,229 INFO ]: Backedges is TWOTRACK [2018-06-22 14:40:34,230 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:40:34,230 INFO ]: Difference is false [2018-06-22 14:40:34,230 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:40:34,230 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:40:34,246 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:40:34,330 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:40:34,330 INFO ]: Found error trace [2018-06-22 14:40:34,331 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:40:34,331 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:40:34,337 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:40:34,339 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:40:34,340 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:40:34,388 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:40:34,388 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:40:34,388 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:40:34,460 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:40:34,693 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:40:34,697 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:40:34,697 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:40:34,699 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:40:34,711 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:40:34,712 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:40:34,713 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:40:34,891 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:40:34,891 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:40:34,892 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:40:34,893 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:40:34,894 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:40:34,908 INFO ]: With dead ends: 13 [2018-06-22 14:40:34,908 INFO ]: Without dead ends: 13 [2018-06-22 14:40:34,912 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 [2018-06-22 14:40:34,927 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:40:34,963 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:40:34,970 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:40:34,971 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:40:34,973 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:40:34,973 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:40:34,973 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:40:34,973 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:40:34,973 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:40:34,974 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:40:34,974 INFO ]: Found error trace [2018-06-22 14:40:34,974 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:40:34,975 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:40:34,975 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:40:34,975 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:40:34,975 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:40:34,976 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:40:34,976 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:40:34,976 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:40:35,168 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:40:35,619 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:40:35,738 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:40:35,738 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:40:35,738 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 [2018-06-22 14:40:35,745 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:40:35,967 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:40:35,983 INFO ]: Computing forward predicates... [2018-06-22 14:40:37,734 WARN ]: Spent 1.02 s on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2018-06-22 14:40:37,841 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:40:37,869 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:40:37,870 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:40:37,870 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:40:37,870 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:40:37,870 INFO ]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:40:37,871 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:40:38,141 WARN ]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-06-22 14:40:38,325 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2018-06-22 14:40:38,541 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2018-06-22 14:40:38,569 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:40:38,569 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:40:38,570 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:40:38,570 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:40:38,571 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:40:38,571 INFO ]: With dead ends: 17 [2018-06-22 14:40:38,571 INFO ]: Without dead ends: 17 [2018-06-22 14:40:38,572 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:40:38,572 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:40:38,575 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:40:38,575 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:40:38,576 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:40:38,576 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2018-06-22 14:40:38,576 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:40:38,576 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:40:38,576 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:40:38,576 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:40:38,577 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:40:38,577 INFO ]: Found error trace [2018-06-22 14:40:38,577 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:40:38,577 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:40:38,577 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 2 times [2018-06-22 14:40:38,577 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:40:38,577 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:40:38,579 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:40:38,579 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:40:38,579 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:40:38,825 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:40:39,518 WARN ]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:40:39,740 WARN ]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:40:40,082 WARN ]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 14:40:40,332 WARN ]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 14:40:40,604 WARN ]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:40:41,043 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:40:41,044 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:40:41,044 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 [2018-06-22 14:40:41,064 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:40:41,394 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:40:41,394 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:40:41,413 INFO ]: Computing forward predicates... [2018-06-22 14:40:42,731 WARN ]: Spent 324.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2018-06-22 14:40:42,968 INFO ]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:40:43,003 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:40:43,003 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-06-22 14:40:43,004 INFO ]: Interpolant automaton has 15 states [2018-06-22 14:40:43,004 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 14:40:43,004 INFO ]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:40:43,005 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 15 states. [2018-06-22 14:40:43,554 WARN ]: Spent 242.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2018-06-22 14:40:43,870 WARN ]: Spent 293.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2018-06-22 14:40:44,217 WARN ]: Spent 301.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2018-06-22 14:40:44,252 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:40:44,252 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 14:40:44,254 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 14:40:44,254 INFO ]: Start accepts. Automaton has 15 states. Word has length 21 [2018-06-22 14:40:44,254 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:40:44,255 INFO ]: With dead ends: 23 [2018-06-22 14:40:44,255 INFO ]: Without dead ends: 23 [2018-06-22 14:40:44,255 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:40:44,255 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 14:40:44,259 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 14:40:44,259 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 14:40:44,260 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 14:40:44,260 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2018-06-22 14:40:44,260 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:40:44,260 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 14:40:44,260 INFO ]: Interpolant automaton has 15 states. [2018-06-22 14:40:44,260 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 14:40:44,261 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 14:40:44,261 INFO ]: Found error trace [2018-06-22 14:40:44,261 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:40:44,261 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:40:44,261 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 3 times [2018-06-22 14:40:44,261 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:40:44,261 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:40:44,262 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:40:44,262 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:40:44,262 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:40:44,591 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:40:45,586 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-06-22 14:40:46,037 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:40:46,037 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:40:46,037 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 [2018-06-22 14:40:46,046 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:40:46,630 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-06-22 14:40:46,630 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:40:46,663 INFO ]: Computing forward predicates... [2018-06-22 14:40:47,313 WARN ]: Spent 286.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2018-06-22 14:40:48,054 WARN ]: Spent 369.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2018-06-22 14:40:49,762 INFO ]: Checked inductivity of 78 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-06-22 14:40:49,788 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:40:49,789 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2018-06-22 14:40:49,789 INFO ]: Interpolant automaton has 24 states [2018-06-22 14:40:49,789 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 14:40:49,789 INFO ]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2018-06-22 14:40:49,790 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 24 states. [2018-06-22 14:40:50,535 WARN ]: Spent 681.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2018-06-22 14:40:50,845 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2018-06-22 14:40:51,108 WARN ]: Spent 193.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2018-06-22 14:40:51,428 WARN ]: Spent 233.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2018-06-22 14:40:51,891 WARN ]: Spent 409.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2018-06-22 14:40:52,435 WARN ]: Spent 494.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2018-06-22 14:40:52,493 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:40:52,493 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 14:40:52,496 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 14:40:52,497 INFO ]: Start accepts. Automaton has 24 states. Word has length 33 [2018-06-22 14:40:52,497 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:40:52,498 INFO ]: With dead ends: 25 [2018-06-22 14:40:52,498 INFO ]: Without dead ends: 25 [2018-06-22 14:40:52,498 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2018-06-22 14:40:52,498 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 14:40:52,502 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 14:40:52,502 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 14:40:52,503 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 14:40:52,503 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 14:40:52,503 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:40:52,503 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 14:40:52,503 INFO ]: Interpolant automaton has 24 states. [2018-06-22 14:40:52,503 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 14:40:52,504 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 14:40:52,504 INFO ]: Found error trace [2018-06-22 14:40:52,505 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:40:52,505 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:40:52,505 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 4 times [2018-06-22 14:40:52,505 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:40:52,505 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:40:52,505 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:40:52,505 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:40:52,505 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:40:52,919 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:40:53,692 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2018-06-22 14:40:53,971 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:40:53,971 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:40:53,971 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 [2018-06-22 14:40:53,977 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown