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/pc_sfifo_3.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:10:20,185 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:10:20,196 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:10:20,213 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:10:20,213 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:10:20,214 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:10:20,218 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:10:20,220 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:10:20,222 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:10:20,222 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:10:20,224 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:10:20,224 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:10:20,225 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:10:20,226 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:10:20,227 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:10:20,230 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:10:20,232 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:10:20,245 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:10:20,247 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:10:20,248 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:10:20,249 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:10:20,251 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:10:20,252 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:10:20,252 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:10:20,253 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:10:20,253 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:10:20,260 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:10:20,260 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:10:20,261 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:10:20,262 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:10:20,262 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:10:20,263 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:10:20,263 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:10:20,264 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:10:20,264 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:10:20,270 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 14:10:20,289 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:10:20,290 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:10:20,290 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:10:20,290 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:10:20,292 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:10:20,292 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:10:20,292 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:10:20,293 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:10:20,293 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:10:20,293 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:10:20,293 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:10:20,293 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:10:20,293 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:10:20,294 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:10:20,294 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:10:20,294 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:10:20,294 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:10:20,294 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:10:20,294 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:10:20,296 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:10:20,296 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:10:20,347 INFO ]: Repository-Root is: /tmp [2018-06-22 14:10:20,362 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:10:20,367 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:10:20,369 INFO ]: Initializing SmtParser... [2018-06-22 14:10:20,369 INFO ]: SmtParser initialized [2018-06-22 14:10:20,370 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/pc_sfifo_3.smt2 [2018-06-22 14:10:20,371 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 14:10:20,456 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/pc_sfifo_3.smt2 unknown [2018-06-22 14:10:20,971 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/pc_sfifo_3.smt2 [2018-06-22 14:10:20,976 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:10:20,989 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:10:20,989 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:10:20,989 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:10:20,990 INFO ]: ChcToBoogie initialized [2018-06-22 14:10:21,002 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:10:20" (1/1) ... [2018-06-22 14:10:21,083 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:21 Unit [2018-06-22 14:10:21,083 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:10:21,083 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:10:21,083 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:10:21,083 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:10:21,112 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:21" (1/1) ... [2018-06-22 14:10:21,113 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:21" (1/1) ... [2018-06-22 14:10:21,139 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:21" (1/1) ... [2018-06-22 14:10:21,139 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:21" (1/1) ... [2018-06-22 14:10:21,151 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:21" (1/1) ... [2018-06-22 14:10:21,152 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:21" (1/1) ... [2018-06-22 14:10:21,155 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:21" (1/1) ... [2018-06-22 14:10:21,160 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:10:21,160 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:10:21,160 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:10:21,160 INFO ]: RCFGBuilder initialized [2018-06-22 14:10:21,161 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:21" (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 14:10:21,190 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:10:21,190 INFO ]: Found specification of procedure False [2018-06-22 14:10:21,190 INFO ]: Found implementation of procedure False [2018-06-22 14:10:21,190 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:10:21,190 INFO ]: Found specification of procedure state [2018-06-22 14:10:21,190 INFO ]: Found implementation of procedure state [2018-06-22 14:10:21,190 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:10:21,190 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:10:21,190 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 14:10:21,542 INFO ]: Using library mode [2018-06-22 14:10:21,542 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:10:21 BoogieIcfgContainer [2018-06-22 14:10:21,542 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:10:21,544 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:10:21,544 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:10:21,551 INFO ]: TraceAbstraction initialized [2018-06-22 14:10:21,551 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:10:20" (1/3) ... [2018-06-22 14:10:21,552 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2b4c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:10:21, skipping insertion in model container [2018-06-22 14:10:21,552 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:10:21" (2/3) ... [2018-06-22 14:10:21,552 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2b4c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:10:21, skipping insertion in model container [2018-06-22 14:10:21,552 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:10:21" (3/3) ... [2018-06-22 14:10:21,554 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:10:21,565 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:10:21,575 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:10:21,628 INFO ]: Using default assertion order modulation [2018-06-22 14:10:21,628 INFO ]: Interprodecural is true [2018-06-22 14:10:21,628 INFO ]: Hoare is false [2018-06-22 14:10:21,628 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:10:21,628 INFO ]: Backedges is TWOTRACK [2018-06-22 14:10:21,629 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:10:21,629 INFO ]: Difference is false [2018-06-22 14:10:21,629 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:10:21,629 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:10:21,648 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:10:21,662 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:10:21,662 INFO ]: Found error trace [2018-06-22 14:10:21,663 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:10:21,663 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:10:21,672 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:10:21,674 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:10:21,674 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:10:21,710 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:10:21,710 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:10:21,710 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:10:21,748 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:10:21,885 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:10:21,887 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:10:21,887 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:10:21,888 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:10:21,904 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:10:21,905 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:10:21,908 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:10:22,048 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:10:22,048 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:10:22,048 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:10:22,050 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:10:22,050 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:10:22,062 INFO ]: With dead ends: 13 [2018-06-22 14:10:22,062 INFO ]: Without dead ends: 13 [2018-06-22 14:10:22,064 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:10:22,091 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:10:22,115 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:10:22,116 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:10:22,117 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:10:22,118 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:10:22,118 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:10:22,118 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:10:22,118 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:10:22,118 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:10:22,120 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:10:22,120 INFO ]: Found error trace [2018-06-22 14:10:22,120 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:10:22,120 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:10:22,120 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:10:22,120 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:10:22,120 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:10:22,121 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:10:22,121 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:10:22,121 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:10:22,293 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:10:22,671 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:10:22,672 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:10:22,672 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 14:10:22,680 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:10:22,799 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:10:22,812 INFO ]: Computing forward predicates... [2018-06-22 14:10:24,418 WARN ]: Spent 1.08 s on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2018-06-22 14:10:24,612 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:10:24,633 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:10:24,633 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:10:24,634 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:10:24,634 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:10:24,634 INFO ]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:10:24,634 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:10:24,788 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-06-22 14:10:24,931 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2018-06-22 14:10:25,017 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:10:25,017 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:10:25,017 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:10:25,017 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:10:25,017 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:10:25,018 INFO ]: With dead ends: 15 [2018-06-22 14:10:25,018 INFO ]: Without dead ends: 15 [2018-06-22 14:10:25,019 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:10:25,019 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:10:25,021 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:10:25,022 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:10:25,022 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:10:25,022 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:10:25,022 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:10:25,022 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:10:25,022 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:10:25,022 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:10:25,023 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:10:25,023 INFO ]: Found error trace [2018-06-22 14:10:25,023 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:10:25,023 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:10:25,023 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:10:25,023 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:10:25,023 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:10:25,024 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:10:25,024 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:10:25,024 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:10:25,099 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:10:25,389 WARN ]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:10:25,468 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:10:25,468 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:10:25,468 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 14:10:25,481 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:10:25,583 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:10:25,583 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:10:25,592 INFO ]: Computing forward predicates... [2018-06-22 14:10:25,897 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2018-06-22 14:10:26,235 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2018-06-22 14:10:26,298 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:10:26,328 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:10:26,328 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:10:26,328 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:10:26,328 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:10:26,329 INFO ]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:10:26,329 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:10:26,544 WARN ]: Spent 190.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2018-06-22 14:10:26,848 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2018-06-22 14:10:26,877 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:10:26,877 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:10:26,877 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:10:26,877 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:10:26,877 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:10:26,878 INFO ]: With dead ends: 17 [2018-06-22 14:10:26,878 INFO ]: Without dead ends: 17 [2018-06-22 14:10:26,878 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:10:26,878 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:10:26,881 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:10:26,881 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:10:26,882 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:10:26,882 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:10:26,882 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:10:26,882 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:10:26,882 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:10:26,882 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:10:26,883 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:10:26,883 INFO ]: Found error trace [2018-06-22 14:10:26,883 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:10:26,883 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:10:26,883 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:10:26,883 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:10:26,883 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:10:26,884 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:10:26,884 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:10:26,884 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:10:26,971 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:10:27,294 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:10:27,503 WARN ]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:10:27,733 WARN ]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 14:10:28,031 WARN ]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:10:28,263 WARN ]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 14:10:28,425 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:10:28,426 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:10:28,426 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 14:10:28,433 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:10:28,553 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:10:28,553 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:10:28,567 INFO ]: Computing forward predicates... [2018-06-22 14:10:31,319 WARN ]: Spent 1.91 s on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2018-06-22 14:10:31,447 INFO ]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:10:31,471 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:10:31,471 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 14:10:31,471 INFO ]: Interpolant automaton has 17 states [2018-06-22 14:10:31,471 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 14:10:31,471 INFO ]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:10:31,471 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 14:10:31,777 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2018-06-22 14:10:31,909 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2018-06-22 14:10:32,166 WARN ]: Spent 238.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-06-22 14:10:32,191 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:10:32,191 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:10:32,192 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:10:32,192 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 14:10:32,192 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:10:32,192 INFO ]: With dead ends: 21 [2018-06-22 14:10:32,192 INFO ]: Without dead ends: 21 [2018-06-22 14:10:32,193 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2018-06-22 14:10:32,193 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:10:32,196 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:10:32,196 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:10:32,196 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:10:32,196 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 21 [2018-06-22 14:10:32,197 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:10:32,197 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:10:32,198 INFO ]: Interpolant automaton has 17 states. [2018-06-22 14:10:32,198 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:10:32,199 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:10:32,199 INFO ]: Found error trace [2018-06-22 14:10:32,199 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:10:32,199 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:10:32,199 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 4 times [2018-06-22 14:10:32,199 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:10:32,199 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:10:32,200 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:10:32,200 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:10:32,200 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:10:32,327 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:10:32,768 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:10:33,117 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:10:33,117 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:10:33,118 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 14:10:33,125 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown