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/token_ring.4.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:31:58,236 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:31:58,239 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:31:58,252 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:31:58,253 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:31:58,254 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:31:58,257 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:31:58,260 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:31:58,261 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:31:58,263 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:31:58,264 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:31:58,264 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:31:58,265 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:31:58,266 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:31:58,267 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:31:58,271 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:31:58,273 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:31:58,286 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:31:58,289 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:31:58,290 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:31:58,291 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:31:58,296 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:31:58,296 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:31:58,296 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:31:58,297 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:31:58,298 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:31:58,299 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:31:58,301 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:31:58,302 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:31:58,302 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:31:58,302 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:31:58,303 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:31:58,303 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:31:58,310 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:31:58,310 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:31:58,311 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 14:31:58,332 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:31:58,332 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:31:58,333 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:31:58,333 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:31:58,334 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:31:58,334 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:31:58,334 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:31:58,335 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:31:58,338 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:31:58,338 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:31:58,338 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:31:58,338 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:31:58,338 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:31:58,338 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:31:58,339 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:31:58,339 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:31:58,339 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:31:58,339 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:31:58,339 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:31:58,341 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:31:58,341 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:31:58,378 INFO ]: Repository-Root is: /tmp [2018-06-22 14:31:58,396 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:31:58,401 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:31:58,404 INFO ]: Initializing SmtParser... [2018-06-22 14:31:58,405 INFO ]: SmtParser initialized [2018-06-22 14:31:58,405 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.4.smt2 [2018-06-22 14:31:58,407 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 14:31:58,510 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.4.smt2 unknown [2018-06-22 14:32:00,082 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.4.smt2 [2018-06-22 14:32:00,092 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:32:00,100 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:32:00,101 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:32:00,101 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:32:00,101 INFO ]: ChcToBoogie initialized [2018-06-22 14:32:00,105 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:32:00" (1/1) ... [2018-06-22 14:32:00,191 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:00 Unit [2018-06-22 14:32:00,191 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:32:00,192 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:32:00,192 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:32:00,192 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:32:00,212 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:00" (1/1) ... [2018-06-22 14:32:00,213 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:00" (1/1) ... [2018-06-22 14:32:00,238 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:00" (1/1) ... [2018-06-22 14:32:00,239 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:00" (1/1) ... [2018-06-22 14:32:00,276 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:00" (1/1) ... [2018-06-22 14:32:00,278 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:00" (1/1) ... [2018-06-22 14:32:00,284 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:00" (1/1) ... [2018-06-22 14:32:00,299 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:32:00,299 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:32:00,299 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:32:00,299 INFO ]: RCFGBuilder initialized [2018-06-22 14:32:00,300 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:00" (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 14:32:00,315 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:32:00,315 INFO ]: Found specification of procedure False [2018-06-22 14:32:00,315 INFO ]: Found implementation of procedure False [2018-06-22 14:32:00,315 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:32:00,315 INFO ]: Found specification of procedure state [2018-06-22 14:32:00,316 INFO ]: Found implementation of procedure state [2018-06-22 14:32:00,316 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:32:00,316 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:32:00,316 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 14:32:01,355 INFO ]: Using library mode [2018-06-22 14:32:01,356 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:32:01 BoogieIcfgContainer [2018-06-22 14:32:01,356 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:32:01,356 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:32:01,357 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:32:01,360 INFO ]: TraceAbstraction initialized [2018-06-22 14:32:01,360 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:32:00" (1/3) ... [2018-06-22 14:32:01,360 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e60b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:32:01, skipping insertion in model container [2018-06-22 14:32:01,361 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:32:00" (2/3) ... [2018-06-22 14:32:01,361 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e60b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:32:01, skipping insertion in model container [2018-06-22 14:32:01,361 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:32:01" (3/3) ... [2018-06-22 14:32:01,363 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:32:01,372 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:32:01,383 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:32:01,430 INFO ]: Using default assertion order modulation [2018-06-22 14:32:01,430 INFO ]: Interprodecural is true [2018-06-22 14:32:01,430 INFO ]: Hoare is false [2018-06-22 14:32:01,430 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:32:01,431 INFO ]: Backedges is TWOTRACK [2018-06-22 14:32:01,431 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:32:01,431 INFO ]: Difference is false [2018-06-22 14:32:01,431 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:32:01,431 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:32:01,446 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:32:01,459 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:32:01,459 INFO ]: Found error trace [2018-06-22 14:32:01,460 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:32:01,460 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:32:01,466 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:32:01,468 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:32:01,469 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:32:01,515 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:01,515 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:32:01,515 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:01,597 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:32:01,823 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:32:01,825 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:32:01,826 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:32:01,827 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:32:01,843 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:32:01,843 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:32:01,846 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:32:02,046 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:32:02,046 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:32:02,127 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:32:02,128 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:32:02,128 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:32:02,141 INFO ]: With dead ends: 13 [2018-06-22 14:32:02,141 INFO ]: Without dead ends: 13 [2018-06-22 14:32:02,145 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 14:32:02,163 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:32:02,191 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:32:02,197 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:32:02,198 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:32:02,199 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:32:02,199 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:32:02,199 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:32:02,199 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:32:02,199 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:32:02,200 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:32:02,200 INFO ]: Found error trace [2018-06-22 14:32:02,201 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:32:02,201 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:32:02,201 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:32:02,201 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:32:02,201 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:32:02,202 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:02,202 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:32:02,202 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:02,546 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:32:03,266 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:32:03,266 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:32:03,267 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 14:32:03,285 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:32:03,506 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:32:03,527 INFO ]: Computing forward predicates... [2018-06-22 14:32:05,223 WARN ]: Spent 422.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 14 [2018-06-22 14:32:05,323 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:32:05,345 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:32:05,345 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:32:05,346 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:32:05,346 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:32:05,347 INFO ]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:32:05,347 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:32:05,621 WARN ]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-06-22 14:32:05,777 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:32:05,777 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:32:05,778 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:32:05,778 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:32:05,778 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:32:05,779 INFO ]: With dead ends: 15 [2018-06-22 14:32:05,779 INFO ]: Without dead ends: 15 [2018-06-22 14:32:05,780 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:32:05,780 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:32:05,782 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:32:05,782 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:32:05,783 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:32:05,783 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:32:05,783 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:32:05,783 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:32:05,783 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:32:05,783 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:32:05,783 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:32:05,783 INFO ]: Found error trace [2018-06-22 14:32:05,784 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:32:05,784 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:32:05,784 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:32:05,784 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:32:05,784 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:32:05,785 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:05,785 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:32:05,785 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:06,034 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:32:06,507 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:32:06,698 WARN ]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:32:06,931 WARN ]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:32:07,175 WARN ]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:32:07,562 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:32:07,563 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:32:07,563 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:32:07,563 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) [2018-06-22 14:32:07,578 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:32:07,903 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:32:07,903 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:32:07,928 INFO ]: Computing forward predicates... [2018-06-22 14:32:08,885 WARN ]: Spent 129.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 14 [2018-06-22 14:32:10,685 WARN ]: Spent 1.01 s on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2018-06-22 14:32:10,827 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:32:10,862 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:32:10,862 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:32:10,863 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:32:10,863 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:32:10,863 INFO ]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:32:10,863 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:32:11,183 WARN ]: Spent 275.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2018-06-22 14:32:11,381 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2018-06-22 14:32:11,725 WARN ]: Spent 307.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2018-06-22 14:32:11,805 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:32:11,805 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:32:11,805 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:32:11,805 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:32:11,806 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:32:11,806 INFO ]: With dead ends: 17 [2018-06-22 14:32:11,806 INFO ]: Without dead ends: 17 [2018-06-22 14:32:11,806 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:32:11,806 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:32:11,809 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:32:11,809 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:32:11,810 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:32:11,810 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:32:11,810 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:32:11,810 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:32:11,810 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:32:11,810 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:32:11,810 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:32:11,810 INFO ]: Found error trace [2018-06-22 14:32:11,811 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:32:11,811 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:32:11,811 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:32:11,811 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:32:11,811 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:32:11,812 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:11,812 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:32:11,812 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:12,038 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:32:12,556 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:32:12,762 WARN ]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:32:12,861 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:32:12,861 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:32:12,861 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 14:32:12,869 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:32:13,234 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:32:13,234 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:32:13,260 INFO ]: Computing forward predicates... [2018-06-22 14:32:15,250 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-06-22 14:32:16,817 WARN ]: Spent 627.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2018-06-22 14:32:18,277 WARN ]: Spent 558.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2018-06-22 14:32:18,496 INFO ]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:32:18,519 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:32:18,519 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 14:32:18,519 INFO ]: Interpolant automaton has 16 states [2018-06-22 14:32:18,520 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 14:32:18,520 INFO ]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:32:18,520 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 14:32:18,746 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 19 [2018-06-22 14:32:19,673 WARN ]: Spent 781.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2018-06-22 14:32:19,712 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:32:19,712 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:32:19,714 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:32:19,714 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 14:32:19,714 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:32:19,714 INFO ]: With dead ends: 19 [2018-06-22 14:32:19,714 INFO ]: Without dead ends: 19 [2018-06-22 14:32:19,715 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2018-06-22 14:32:19,715 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:32:19,717 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:32:19,717 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:32:19,718 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:32:19,718 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:32:19,718 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:32:19,718 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:32:19,718 INFO ]: Interpolant automaton has 16 states. [2018-06-22 14:32:19,718 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:32:19,719 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:32:19,719 INFO ]: Found error trace [2018-06-22 14:32:19,719 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:32:19,719 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:32:19,719 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 14:32:19,719 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:32:19,719 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:32:19,720 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:19,720 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:32:19,720 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:32:20,015 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:32:20,609 WARN ]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:32:20,756 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:32:20,756 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:32:20,756 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 14:32:20,761 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown