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/lustre/metros_2_e1_1116_e2_617.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:06:45,477 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:06:45,481 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:06:45,495 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:06:45,495 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:06:45,496 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:06:45,497 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:06:45,499 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:06:45,501 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:06:45,503 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:06:45,504 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:06:45,504 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:06:45,505 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:06:45,506 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:06:45,507 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:06:45,511 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:06:45,513 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:06:45,515 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:06:45,526 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:06:45,527 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:06:45,529 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:06:45,531 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:06:45,532 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:06:45,532 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:06:45,533 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:06:45,536 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:06:45,537 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:06:45,538 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:06:45,539 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:06:45,539 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:06:45,540 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:06:45,541 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:06:45,541 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:06:45,542 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:06:45,543 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:06:45,543 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 19:06:45,569 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:06:45,569 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:06:45,569 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:06:45,569 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:06:45,572 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:06:45,573 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:06:45,573 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:06:45,573 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:06:45,573 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:06:45,574 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:06:45,574 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:06:45,574 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:06:45,574 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:06:45,574 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:06:45,575 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:06:45,575 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:06:45,575 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:06:45,576 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:06:45,576 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:06:45,577 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:06:45,577 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:06:45,631 INFO ]: Repository-Root is: /tmp [2018-06-22 19:06:45,647 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:06:45,652 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:06:45,653 INFO ]: Initializing SmtParser... [2018-06-22 19:06:45,653 INFO ]: SmtParser initialized [2018-06-22 19:06:45,654 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e2_617.smt2 [2018-06-22 19:06:45,656 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 19:06:45,745 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e2_617.smt2 unknown [2018-06-22 19:06:46,150 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e2_617.smt2 [2018-06-22 19:06:46,155 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:06:46,161 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:06:46,161 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:06:46,161 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:06:46,161 INFO ]: ChcToBoogie initialized [2018-06-22 19:06:46,165 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:06:46" (1/1) ... [2018-06-22 19:06:46,266 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:06:46 Unit [2018-06-22 19:06:46,266 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:06:46,267 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:06:46,267 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:06:46,267 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:06:46,296 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:06:46" (1/1) ... [2018-06-22 19:06:46,296 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:06:46" (1/1) ... [2018-06-22 19:06:46,310 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:06:46" (1/1) ... [2018-06-22 19:06:46,318 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:06:46" (1/1) ... [2018-06-22 19:06:46,323 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:06:46" (1/1) ... [2018-06-22 19:06:46,324 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:06:46" (1/1) ... [2018-06-22 19:06:46,331 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:06:46" (1/1) ... [2018-06-22 19:06:46,334 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:06:46,335 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:06:46,335 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:06:46,335 INFO ]: RCFGBuilder initialized [2018-06-22 19:06:46,338 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:06:46" (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 19:06:46,356 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:06:46,356 INFO ]: Found specification of procedure False [2018-06-22 19:06:46,356 INFO ]: Found implementation of procedure False [2018-06-22 19:06:46,356 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:06:46,356 INFO ]: Found specification of procedure state [2018-06-22 19:06:46,356 INFO ]: Found implementation of procedure state [2018-06-22 19:06:46,356 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:06:46,356 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:06:46,356 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 19:06:46,685 INFO ]: Using library mode [2018-06-22 19:06:46,686 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:06:46 BoogieIcfgContainer [2018-06-22 19:06:46,686 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:06:46,687 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:06:46,687 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:06:46,693 INFO ]: TraceAbstraction initialized [2018-06-22 19:06:46,694 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:06:46" (1/3) ... [2018-06-22 19:06:46,695 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d727616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:06:46, skipping insertion in model container [2018-06-22 19:06:46,695 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:06:46" (2/3) ... [2018-06-22 19:06:46,695 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d727616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:06:46, skipping insertion in model container [2018-06-22 19:06:46,695 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:06:46" (3/3) ... [2018-06-22 19:06:46,697 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:06:46,707 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:06:46,716 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:06:46,750 INFO ]: Using default assertion order modulation [2018-06-22 19:06:46,750 INFO ]: Interprodecural is true [2018-06-22 19:06:46,750 INFO ]: Hoare is false [2018-06-22 19:06:46,750 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:06:46,750 INFO ]: Backedges is TWOTRACK [2018-06-22 19:06:46,750 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:06:46,750 INFO ]: Difference is false [2018-06-22 19:06:46,750 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:06:46,750 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:06:46,764 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:06:46,778 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:06:46,778 INFO ]: Found error trace [2018-06-22 19:06:46,782 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:06:46,782 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:06:46,788 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 19:06:46,790 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:06:46,790 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:06:46,828 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:06:46,857 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:06:46,857 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:06:46,967 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:06:47,096 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:06:47,099 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:06:47,099 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:06:47,101 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:06:47,112 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:06:47,112 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:06:47,114 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:06:47,242 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:06:47,242 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:06:47,243 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:06:47,244 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:06:47,245 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:06:47,256 INFO ]: With dead ends: 13 [2018-06-22 19:06:47,265 INFO ]: Without dead ends: 13 [2018-06-22 19:06:47,267 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 19:06:47,303 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:06:47,379 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:06:47,380 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:06:47,381 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:06:47,382 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:06:47,382 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:06:47,382 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:06:47,382 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:06:47,382 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:06:47,383 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:06:47,383 INFO ]: Found error trace [2018-06-22 19:06:47,383 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:06:47,383 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:06:47,383 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 19:06:47,383 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:06:47,384 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:06:47,384 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:06:47,384 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:06:47,384 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:06:47,494 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:06:47,954 WARN ]: Spent 281.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2018-06-22 19:06:47,980 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:06:47,980 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:06:47,980 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 19:06:47,987 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:06:48,142 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:06:48,153 INFO ]: Computing forward predicates... [2018-06-22 19:06:48,611 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2018-06-22 19:06:48,763 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:06:48,797 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:06:48,797 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 19:06:48,798 INFO ]: Interpolant automaton has 9 states [2018-06-22 19:06:48,798 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 19:06:48,798 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 19:06:48,798 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 19:06:49,111 WARN ]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-06-22 19:06:49,362 WARN ]: Spent 130.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2018-06-22 19:06:49,556 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:06:49,556 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:06:49,558 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:06:49,558 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 19:06:49,559 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:06:49,559 INFO ]: With dead ends: 15 [2018-06-22 19:06:49,559 INFO ]: Without dead ends: 15 [2018-06-22 19:06:49,560 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-06-22 19:06:49,560 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:06:49,562 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:06:49,562 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:06:49,565 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:06:49,565 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:06:49,565 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:06:49,565 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:06:49,565 INFO ]: Interpolant automaton has 9 states. [2018-06-22 19:06:49,565 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:06:49,566 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:06:49,566 INFO ]: Found error trace [2018-06-22 19:06:49,566 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:06:49,566 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:06:49,566 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 19:06:49,566 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:06:49,566 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:06:49,567 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:06:49,567 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:06:49,567 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:06:49,687 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:06:49,946 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:06:49,946 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:06:49,946 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 19:06:49,956 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:06:50,085 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:06:50,085 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:06:50,092 INFO ]: Computing forward predicates... [2018-06-22 19:06:50,461 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-06-22 19:06:50,741 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:06:50,777 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:06:50,777 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:06:50,778 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:06:50,778 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:06:50,778 INFO ]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:06:50,778 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:06:51,035 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2018-06-22 19:06:51,305 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2018-06-22 19:06:51,468 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:06:51,468 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:06:51,470 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:06:51,470 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:06:51,470 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:06:51,470 INFO ]: With dead ends: 17 [2018-06-22 19:06:51,470 INFO ]: Without dead ends: 17 [2018-06-22 19:06:51,471 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:06:51,471 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:06:51,474 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:06:51,474 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:06:51,475 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:06:51,475 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:06:51,475 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:06:51,475 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:06:51,475 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:06:51,475 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:06:51,476 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:06:51,476 INFO ]: Found error trace [2018-06-22 19:06:51,476 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:06:51,476 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:06:51,476 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 19:06:51,476 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:06:51,476 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:06:51,477 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:06:51,477 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:06:51,477 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:06:51,614 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:06:52,197 WARN ]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-06-22 19:06:52,459 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 22 [2018-06-22 19:06:52,914 WARN ]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-22 19:06:52,965 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:06:52,965 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:06:52,965 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) [2018-06-22 19:06:52,980 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:06:53,132 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:06:53,132 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:06:53,138 INFO ]: Computing forward predicates... [2018-06-22 19:06:53,344 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:06:53,364 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:06:53,364 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:06:53,365 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:06:53,365 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:06:53,365 INFO ]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:06:53,365 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:06:53,630 WARN ]: Spent 221.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-06-22 19:06:53,953 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2018-06-22 19:06:54,251 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:06:54,252 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:06:54,253 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:06:54,253 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:06:54,253 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:06:54,253 INFO ]: With dead ends: 19 [2018-06-22 19:06:54,254 INFO ]: Without dead ends: 19 [2018-06-22 19:06:54,254 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:06:54,254 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:06:54,256 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:06:54,256 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:06:54,256 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:06:54,256 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:06:54,257 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:06:54,257 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:06:54,257 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:06:54,257 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:06:54,258 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:06:54,258 INFO ]: Found error trace [2018-06-22 19:06:54,258 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:06:54,258 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:06:54,258 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 19:06:54,259 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:06:54,259 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:06:54,259 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:06:54,259 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:06:54,259 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:06:54,371 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:06:54,976 WARN ]: Spent 238.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2018-06-22 19:06:55,493 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2018-06-22 19:06:55,573 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:06:55,573 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:06:55,573 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 19:06:55,579 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:06:55,742 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:06:55,742 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:06:55,749 INFO ]: Computing forward predicates... [2018-06-22 19:06:56,084 INFO ]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 19:06:56,108 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:06:56,108 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 19:06:56,109 INFO ]: Interpolant automaton has 20 states [2018-06-22 19:06:56,109 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 19:06:56,109 INFO ]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-06-22 19:06:56,110 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 19:06:56,354 WARN ]: Spent 194.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 85 [2018-06-22 19:06:56,655 WARN ]: Spent 211.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 90 [2018-06-22 19:06:57,055 WARN ]: Spent 361.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 88 [2018-06-22 19:06:57,294 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 86 [2018-06-22 19:06:57,611 WARN ]: Spent 269.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2018-06-22 19:06:57,806 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2018-06-22 19:06:57,853 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:06:57,853 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 19:06:57,857 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 19:06:57,857 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 19:06:57,858 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:06:57,858 INFO ]: With dead ends: 23 [2018-06-22 19:06:57,858 INFO ]: Without dead ends: 23 [2018-06-22 19:06:57,859 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2018-06-22 19:06:57,859 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 19:06:57,865 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 19:06:57,865 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 19:06:57,865 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 19:06:57,866 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 25 [2018-06-22 19:06:57,866 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:06:57,866 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 19:06:57,866 INFO ]: Interpolant automaton has 20 states. [2018-06-22 19:06:57,866 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 19:06:57,867 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 19:06:57,867 INFO ]: Found error trace [2018-06-22 19:06:57,867 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:06:57,867 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:06:57,867 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 5 times [2018-06-22 19:06:57,867 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:06:57,867 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:06:57,868 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:06:57,868 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:06:57,868 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:06:58,141 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:06:59,541 WARN ]: Spent 1.01 s on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2018-06-22 19:06:59,823 WARN ]: Spent 271.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2018-06-22 19:07:00,038 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 19 [2018-06-22 19:07:00,390 WARN ]: Spent 298.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2018-06-22 19:07:00,763 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 21 [2018-06-22 19:07:01,041 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 20 [2018-06-22 19:07:01,379 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 20 [2018-06-22 19:07:01,733 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2018-06-22 19:07:01,762 INFO ]: Checked inductivity of 78 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-06-22 19:07:01,762 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:07:01,762 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:07:01,771 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 19:07:02,057 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-06-22 19:07:02,057 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:02,074 INFO ]: Computing forward predicates... [2018-06-22 19:07:02,832 INFO ]: Checked inductivity of 78 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-06-22 19:07:02,853 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:07:02,853 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2018-06-22 19:07:02,853 INFO ]: Interpolant automaton has 26 states [2018-06-22 19:07:02,854 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 19:07:02,854 INFO ]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2018-06-22 19:07:02,854 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 26 states. [2018-06-22 19:07:03,119 WARN ]: Spent 211.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 107 [2018-06-22 19:07:03,457 WARN ]: Spent 221.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 92 [2018-06-22 19:07:03,817 WARN ]: Spent 321.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 96 [2018-06-22 19:07:04,242 WARN ]: Spent 361.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 93 [2018-06-22 19:07:04,656 WARN ]: Spent 291.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 117 [2018-06-22 19:07:04,908 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 103 [2018-06-22 19:07:05,134 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 91 [2018-06-22 19:07:05,464 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 82 [2018-06-22 19:07:05,528 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:05,528 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 19:07:05,529 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 19:07:05,529 INFO ]: Start accepts. Automaton has 26 states. Word has length 33 [2018-06-22 19:07:05,529 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:05,530 INFO ]: With dead ends: 27 [2018-06-22 19:07:05,530 INFO ]: Without dead ends: 27 [2018-06-22 19:07:05,531 INFO ]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=244, Invalid=946, Unknown=0, NotChecked=0, Total=1190 [2018-06-22 19:07:05,531 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 19:07:05,534 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 19:07:05,534 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 19:07:05,535 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 19:07:05,535 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 33 [2018-06-22 19:07:05,536 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:05,536 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 19:07:05,536 INFO ]: Interpolant automaton has 26 states. [2018-06-22 19:07:05,536 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 19:07:05,537 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 19:07:05,537 INFO ]: Found error trace [2018-06-22 19:07:05,537 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:05,537 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:05,537 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 6 times [2018-06-22 19:07:05,537 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:05,537 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:05,538 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:05,538 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:07:05,538 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:05,698 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:06,369 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2018-06-22 19:07:06,513 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2018-06-22 19:07:06,768 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2018-06-22 19:07:07,022 WARN ]: Spent 239.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2018-06-22 19:07:07,205 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2018-06-22 19:07:07,670 WARN ]: Spent 209.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2018-06-22 19:07:08,275 WARN ]: Spent 216.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2018-06-22 19:07:08,450 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 38 [2018-06-22 19:07:08,637 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 45 [2018-06-22 19:07:08,811 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 23 [2018-06-22 19:07:08,987 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 24 [2018-06-22 19:07:09,017 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 19:07:09,019 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:07:09,019 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:07:09,033 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 19:07:09,386 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-06-22 19:07:09,386 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:09,400 INFO ]: Computing forward predicates... [2018-06-22 19:07:10,254 INFO ]: Checked inductivity of 136 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-06-22 19:07:10,276 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:07:10,276 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2018-06-22 19:07:10,277 INFO ]: Interpolant automaton has 36 states [2018-06-22 19:07:10,277 INFO ]: Constructing interpolant automaton starting with 36 interpolants. [2018-06-22 19:07:10,277 INFO ]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 19:07:10,277 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 36 states. [2018-06-22 19:07:10,648 WARN ]: Spent 289.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 111 [2018-06-22 19:07:11,309 WARN ]: Spent 511.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 105 [2018-06-22 19:07:11,790 WARN ]: Spent 406.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 119 [2018-06-22 19:07:12,417 WARN ]: Spent 469.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 127 [2018-06-22 19:07:12,963 WARN ]: Spent 409.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 129 [2018-06-22 19:07:13,597 WARN ]: Spent 493.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 136 [2018-06-22 19:07:14,059 WARN ]: Spent 367.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 125 [2018-06-22 19:07:14,425 WARN ]: Spent 291.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 111 [2018-06-22 19:07:14,816 WARN ]: Spent 320.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 113 [2018-06-22 19:07:14,833 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:14,833 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 19:07:14,833 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 19:07:14,833 INFO ]: Start accepts. Automaton has 36 states. Word has length 41 [2018-06-22 19:07:14,834 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:14,834 INFO ]: With dead ends: 23 [2018-06-22 19:07:14,834 INFO ]: Without dead ends: 0 [2018-06-22 19:07:14,835 INFO ]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=377, Invalid=1693, Unknown=0, NotChecked=0, Total=2070 [2018-06-22 19:07:14,835 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 19:07:14,835 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 19:07:14,835 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 19:07:14,835 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 19:07:14,835 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2018-06-22 19:07:14,835 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:14,835 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 19:07:14,835 INFO ]: Interpolant automaton has 36 states. [2018-06-22 19:07:14,835 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 19:07:14,835 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 19:07:14,942 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:07:14 BoogieIcfgContainer [2018-06-22 19:07:14,942 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 19:07:14,943 INFO ]: Toolchain (without parser) took 28786.89 ms. Allocated memory was 309.3 MB in the beginning and 714.1 MB in the end (delta: 404.8 MB). Free memory was 250.8 MB in the beginning and 192.8 MB in the end (delta: 58.0 MB). Peak memory consumption was 462.7 MB. Max. memory is 3.6 GB. [2018-06-22 19:07:14,943 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:07:14,943 INFO ]: ChcToBoogie took 105.53 ms. Allocated memory is still 309.3 MB. Free memory was 250.8 MB in the beginning and 248.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:07:14,944 INFO ]: Boogie Preprocessor took 67.22 ms. Allocated memory is still 309.3 MB. Free memory was 248.8 MB in the beginning and 246.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:07:14,944 INFO ]: RCFGBuilder took 351.06 ms. Allocated memory is still 309.3 MB. Free memory was 246.8 MB in the beginning and 222.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 3.6 GB. [2018-06-22 19:07:14,944 INFO ]: TraceAbstraction took 28254.47 ms. Allocated memory was 309.3 MB in the beginning and 714.1 MB in the end (delta: 404.8 MB). Free memory was 222.6 MB in the beginning and 192.8 MB in the end (delta: 29.8 MB). Peak memory consumption was 434.6 MB. Max. memory is 3.6 GB. [2018-06-22 19:07:14,948 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 105.53 ms. Allocated memory is still 309.3 MB. Free memory was 250.8 MB in the beginning and 248.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 67.22 ms. Allocated memory is still 309.3 MB. Free memory was 248.8 MB in the beginning and 246.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 351.06 ms. Allocated memory is still 309.3 MB. Free memory was 246.8 MB in the beginning and 222.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 28254.47 ms. Allocated memory was 309.3 MB in the beginning and 714.1 MB in the end (delta: 404.8 MB). Free memory was 222.6 MB in the beginning and 192.8 MB in the end (delta: 29.8 MB). Peak memory consumption was 434.6 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. SAFE Result, 28.1s OverallTime, 7 OverallIterations, 9 TraceHistogramMax, 11.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 74 SDtfs, 252 SDslu, 536 SDs, 0 SdLazy, 451 SolverSat, 322 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 258 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 20.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 13.8s InterpolantComputationTime, 309 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 296 ConstructedInterpolants, 0 QuantifiedInterpolants, 133420 SizeOfPredicates, 215 NumberOfNonLiveVariables, 6756 ConjunctsInSsa, 430 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 158/568 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_2_e1_1116_e2_617.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_19-07-14-962.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_2_e1_1116_e2_617.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_19-07-14-962.csv Received shutdown request...