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/car_2_e8_491_e7_826.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:51:42,254 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:51:42,255 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:51:42,268 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:51:42,269 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:51:42,270 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:51:42,271 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:51:42,272 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:51:42,274 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:51:42,275 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:51:42,275 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:51:42,278 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:51:42,278 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:51:42,279 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:51:42,280 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:51:42,283 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:51:42,285 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:51:42,288 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:51:42,290 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:51:42,291 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:51:42,292 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:51:42,294 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:51:42,294 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:51:42,295 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:51:42,295 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:51:42,296 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:51:42,297 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:51:42,298 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:51:42,299 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:51:42,299 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:51:42,300 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:51:42,301 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:51:42,301 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:51:42,302 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:51:42,302 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:51:42,302 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 15:51:42,319 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:51:42,319 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:51:42,320 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:51:42,320 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:51:42,321 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:51:42,321 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:51:42,321 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:51:42,321 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:51:42,322 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:51:42,325 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:51:42,325 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:51:42,325 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:51:42,326 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:51:42,326 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:51:42,326 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:51:42,326 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:51:42,326 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:51:42,326 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:51:42,327 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:51:42,329 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:51:42,329 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:51:42,367 INFO ]: Repository-Root is: /tmp [2018-06-22 15:51:42,385 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:51:42,388 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:51:42,390 INFO ]: Initializing SmtParser... [2018-06-22 15:51:42,390 INFO ]: SmtParser initialized [2018-06-22 15:51:42,391 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/car_2_e8_491_e7_826.smt2 [2018-06-22 15:51:42,393 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 15:51:42,526 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/car_2_e8_491_e7_826.smt2 unknown [2018-06-22 15:51:42,889 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/car_2_e8_491_e7_826.smt2 [2018-06-22 15:51:42,893 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:51:42,901 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:51:42,902 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:51:42,902 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:51:42,902 INFO ]: ChcToBoogie initialized [2018-06-22 15:51:42,905 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:51:42" (1/1) ... [2018-06-22 15:51:42,952 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:51:42 Unit [2018-06-22 15:51:42,952 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:51:42,952 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:51:42,953 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:51:42,953 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:51:42,975 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:51:42" (1/1) ... [2018-06-22 15:51:42,975 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:51:42" (1/1) ... [2018-06-22 15:51:42,984 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:51:42" (1/1) ... [2018-06-22 15:51:42,984 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:51:42" (1/1) ... [2018-06-22 15:51:42,999 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:51:42" (1/1) ... [2018-06-22 15:51:43,000 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:51:42" (1/1) ... [2018-06-22 15:51:43,002 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:51:42" (1/1) ... [2018-06-22 15:51:43,013 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:51:43,014 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:51:43,014 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:51:43,014 INFO ]: RCFGBuilder initialized [2018-06-22 15:51:43,015 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:51:42" (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 15:51:43,034 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:51:43,034 INFO ]: Found specification of procedure False [2018-06-22 15:51:43,034 INFO ]: Found implementation of procedure False [2018-06-22 15:51:43,034 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:51:43,034 INFO ]: Found specification of procedure state [2018-06-22 15:51:43,034 INFO ]: Found implementation of procedure state [2018-06-22 15:51:43,035 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:51:43,035 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:51:43,035 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 15:51:43,376 INFO ]: Using library mode [2018-06-22 15:51:43,377 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:51:43 BoogieIcfgContainer [2018-06-22 15:51:43,377 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:51:43,379 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:51:43,379 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:51:43,382 INFO ]: TraceAbstraction initialized [2018-06-22 15:51:43,382 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:51:42" (1/3) ... [2018-06-22 15:51:43,383 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f9aea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:51:43, skipping insertion in model container [2018-06-22 15:51:43,383 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:51:42" (2/3) ... [2018-06-22 15:51:43,383 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f9aea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:51:43, skipping insertion in model container [2018-06-22 15:51:43,383 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:51:43" (3/3) ... [2018-06-22 15:51:43,385 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:51:43,395 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:51:43,403 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:51:43,440 INFO ]: Using default assertion order modulation [2018-06-22 15:51:43,441 INFO ]: Interprodecural is true [2018-06-22 15:51:43,441 INFO ]: Hoare is false [2018-06-22 15:51:43,441 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:51:43,441 INFO ]: Backedges is TWOTRACK [2018-06-22 15:51:43,441 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:51:43,441 INFO ]: Difference is false [2018-06-22 15:51:43,441 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:51:43,441 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:51:43,453 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:51:43,463 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:51:43,463 INFO ]: Found error trace [2018-06-22 15:51:43,463 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:51:43,464 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:51:43,469 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:51:43,471 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:51:43,471 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:51:43,511 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:43,511 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:51:43,511 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:43,602 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:51:43,849 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:51:43,852 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:51:43,852 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:51:43,853 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:51:43,864 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:51:43,864 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:51:43,866 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:51:43,960 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:51:43,960 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:51:43,961 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:51:43,962 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:51:43,962 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:51:43,974 INFO ]: With dead ends: 13 [2018-06-22 15:51:43,974 INFO ]: Without dead ends: 13 [2018-06-22 15:51:43,975 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 15:51:43,988 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:51:44,007 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:51:44,008 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:51:44,009 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:51:44,010 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:51:44,010 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:51:44,010 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:51:44,010 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:51:44,010 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:51:44,012 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:51:44,012 INFO ]: Found error trace [2018-06-22 15:51:44,012 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:51:44,012 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:51:44,013 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:51:44,013 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:51:44,013 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:51:44,014 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:44,014 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:51:44,014 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:44,086 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:51:44,963 WARN ]: Spent 731.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2018-06-22 15:51:45,048 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:51:45,048 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:51:45,048 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 15:51:45,058 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:51:45,121 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:51:45,129 INFO ]: Computing forward predicates... [2018-06-22 15:51:45,898 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 15 [2018-06-22 15:51:46,213 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-06-22 15:51:46,321 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:51:46,349 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:51:46,349 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:51:46,350 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:51:46,350 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:51:46,350 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:51:46,350 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:51:46,519 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2018-06-22 15:51:46,616 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:51:46,616 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:51:46,617 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:51:46,617 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:51:46,617 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:51:46,617 INFO ]: With dead ends: 15 [2018-06-22 15:51:46,617 INFO ]: Without dead ends: 15 [2018-06-22 15:51:46,618 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:51:46,618 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:51:46,621 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:51:46,621 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:51:46,621 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:51:46,622 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:51:46,622 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:51:46,622 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:51:46,622 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:51:46,622 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:51:46,622 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:51:46,622 INFO ]: Found error trace [2018-06-22 15:51:46,622 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:51:46,622 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:51:46,622 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:51:46,622 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:51:46,622 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:51:46,623 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:46,623 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:51:46,623 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:46,696 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:51:46,993 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:51:46,994 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:51:46,994 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 15:51:47,008 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:51:47,093 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:51:47,093 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:51:47,098 INFO ]: Computing forward predicates... [2018-06-22 15:51:47,623 WARN ]: Spent 262.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 5 [2018-06-22 15:51:48,099 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:51:48,119 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:51:48,119 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 15:51:48,120 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:51:48,120 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:51:48,120 INFO ]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:51:48,120 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 15:51:48,403 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:51:48,403 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:51:48,404 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:51:48,404 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 15:51:48,404 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:51:48,404 INFO ]: With dead ends: 17 [2018-06-22 15:51:48,404 INFO ]: Without dead ends: 17 [2018-06-22 15:51:48,405 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:51:48,405 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:51:48,406 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:51:48,406 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:51:48,410 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:51:48,410 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:51:48,411 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:51:48,411 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:51:48,411 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:51:48,411 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:51:48,412 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:51:48,412 INFO ]: Found error trace [2018-06-22 15:51:48,412 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:51:48,412 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:51:48,412 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:51:48,412 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:51:48,412 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:51:48,413 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:48,413 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:51:48,413 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:48,483 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:51:49,312 WARN ]: Spent 612.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-06-22 15:51:49,587 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:51:49,587 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:51:49,587 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 15:51:49,604 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 15:51:49,698 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:51:49,698 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:51:49,702 INFO ]: Computing forward predicates... [2018-06-22 15:51:50,098 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:51:50,122 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:51:50,122 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 15:51:50,123 INFO ]: Interpolant automaton has 17 states [2018-06-22 15:51:50,123 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 15:51:50,123 INFO ]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:51:50,123 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 15:51:50,558 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:51:50,558 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:51:50,559 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:51:50,559 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 15:51:50,559 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:51:50,559 INFO ]: With dead ends: 19 [2018-06-22 15:51:50,559 INFO ]: Without dead ends: 19 [2018-06-22 15:51:50,560 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:51:50,560 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:51:50,563 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:51:50,563 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:51:50,563 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:51:50,564 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:51:50,564 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:51:50,564 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:51:50,564 INFO ]: Interpolant automaton has 17 states. [2018-06-22 15:51:50,564 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:51:50,564 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:51:50,564 INFO ]: Found error trace [2018-06-22 15:51:50,564 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:51:50,564 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:51:50,565 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:51:50,565 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:51:50,565 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:51:50,565 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:50,565 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:51:50,565 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:50,641 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:51:51,180 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2018-06-22 15:51:51,369 WARN ]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2018-06-22 15:51:51,646 WARN ]: Spent 264.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-06-22 15:51:51,983 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2018-06-22 15:51:52,145 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:51:52,145 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:51:52,145 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 15:51:52,154 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:51:52,265 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:51:52,265 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:51:52,271 INFO ]: Computing forward predicates... [2018-06-22 15:51:52,895 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:51:52,915 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:51:52,915 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-22 15:51:52,915 INFO ]: Interpolant automaton has 21 states [2018-06-22 15:51:52,915 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 15:51:52,915 INFO ]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:51:52,915 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-22 15:51:53,403 WARN ]: Spent 394.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 129 [2018-06-22 15:51:54,018 WARN ]: Spent 573.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 117 [2018-06-22 15:51:54,479 WARN ]: Spent 419.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 120 [2018-06-22 15:51:54,933 WARN ]: Spent 331.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 118 [2018-06-22 15:51:55,301 WARN ]: Spent 325.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 116 [2018-06-22 15:51:55,341 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:51:55,342 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:51:55,342 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:51:55,342 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-22 15:51:55,342 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:51:55,342 INFO ]: With dead ends: 21 [2018-06-22 15:51:55,343 INFO ]: Without dead ends: 21 [2018-06-22 15:51:55,343 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2018-06-22 15:51:55,343 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:51:55,346 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:51:55,346 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:51:55,347 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:51:55,347 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:51:55,347 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:51:55,347 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:51:55,347 INFO ]: Interpolant automaton has 21 states. [2018-06-22 15:51:55,347 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:51:55,348 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:51:55,348 INFO ]: Found error trace [2018-06-22 15:51:55,348 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:51:55,348 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:51:55,348 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:51:55,348 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:51:55,348 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:51:55,349 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:55,349 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:51:55,349 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:55,407 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:51:55,859 WARN ]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-22 15:51:56,877 WARN ]: Spent 937.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2018-06-22 15:51:57,272 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2018-06-22 15:51:57,370 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:51:57,371 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:51:57,371 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 15:51:57,376 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:51:57,478 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:51:57,478 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:51:57,483 INFO ]: Computing forward predicates... [2018-06-22 15:51:58,349 INFO ]: Checked inductivity of 55 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:51:58,377 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:51:58,377 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-22 15:51:58,378 INFO ]: Interpolant automaton has 25 states [2018-06-22 15:51:58,378 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 15:51:58,378 INFO ]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2018-06-22 15:51:58,378 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 25 states. [2018-06-22 15:51:58,584 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2018-06-22 15:51:58,748 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2018-06-22 15:51:58,897 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2018-06-22 15:51:59,034 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2018-06-22 15:51:59,279 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2018-06-22 15:51:59,418 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2018-06-22 15:51:59,583 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2018-06-22 15:51:59,610 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:51:59,610 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:51:59,610 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:51:59,610 INFO ]: Start accepts. Automaton has 25 states. Word has length 29 [2018-06-22 15:51:59,610 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:51:59,611 INFO ]: With dead ends: 25 [2018-06-22 15:51:59,611 INFO ]: Without dead ends: 25 [2018-06-22 15:51:59,611 INFO ]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 15:51:59,611 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:51:59,614 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:51:59,614 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:51:59,615 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:51:59,615 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-22 15:51:59,615 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:51:59,615 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:51:59,615 INFO ]: Interpolant automaton has 25 states. [2018-06-22 15:51:59,615 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:51:59,616 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:51:59,616 INFO ]: Found error trace [2018-06-22 15:51:59,616 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:51:59,616 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:51:59,617 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 6 times [2018-06-22 15:51:59,617 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:51:59,617 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:51:59,617 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:59,617 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:51:59,617 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:51:59,763 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:00,528 WARN ]: Spent 343.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2018-06-22 15:52:01,101 WARN ]: Spent 559.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 72 [2018-06-22 15:52:01,389 WARN ]: Spent 275.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2018-06-22 15:52:01,849 WARN ]: Spent 367.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 71 [2018-06-22 15:52:02,092 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2018-06-22 15:52:02,263 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2018-06-22 15:52:02,871 WARN ]: Spent 243.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 43 [2018-06-22 15:52:03,198 WARN ]: Spent 285.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 53 [2018-06-22 15:52:03,600 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:52:03,600 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:52:03,600 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) [2018-06-22 15:52:03,633 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:52:03,882 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-06-22 15:52:03,882 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:52:03,901 INFO ]: Computing forward predicates... [2018-06-22 15:52:04,587 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2018-06-22 15:52:06,066 WARN ]: Spent 621.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2018-06-22 15:52:06,222 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:52:06,229 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 15:52:07,635 WARN ]: Spent 240.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2018-06-22 15:52:08,544 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2018-06-22 15:52:09,163 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:52:09,184 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:52:09,184 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2018-06-22 15:52:09,185 INFO ]: Interpolant automaton has 33 states [2018-06-22 15:52:09,185 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 15:52:09,185 INFO ]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 15:52:09,186 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 33 states. [2018-06-22 15:52:10,782 WARN ]: Spent 1.39 s on a formula simplification. DAG size of input: 279 DAG size of output: 183 [2018-06-22 15:52:11,703 WARN ]: Spent 832.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 108 [2018-06-22 15:52:13,094 WARN ]: Spent 1.30 s on a formula simplification. DAG size of input: 344 DAG size of output: 159 [2018-06-22 15:52:14,506 WARN ]: Spent 1.30 s on a formula simplification. DAG size of input: 340 DAG size of output: 163 [2018-06-22 15:52:15,740 WARN ]: Spent 1.13 s on a formula simplification. DAG size of input: 314 DAG size of output: 150 [2018-06-22 15:52:16,981 WARN ]: Spent 1.14 s on a formula simplification. DAG size of input: 304 DAG size of output: 148 [2018-06-22 15:52:18,338 WARN ]: Spent 1.22 s on a formula simplification. DAG size of input: 274 DAG size of output: 167 [2018-06-22 15:52:19,668 WARN ]: Spent 1.22 s on a formula simplification. DAG size of input: 275 DAG size of output: 166 [2018-06-22 15:52:21,146 WARN ]: Spent 1.20 s on a formula simplification. DAG size of input: 269 DAG size of output: 162 [2018-06-22 15:52:21,194 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:52:21,194 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:52:21,194 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:52:21,194 INFO ]: Start accepts. Automaton has 33 states. Word has length 37 [2018-06-22 15:52:21,194 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:52:21,194 INFO ]: With dead ends: 23 [2018-06-22 15:52:21,194 INFO ]: Without dead ends: 0 [2018-06-22 15:52:21,195 INFO ]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=336, Invalid=1470, Unknown=0, NotChecked=0, Total=1806 [2018-06-22 15:52:21,195 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 15:52:21,195 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 15:52:21,195 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 15:52:21,195 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 15:52:21,196 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2018-06-22 15:52:21,196 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:52:21,196 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 15:52:21,196 INFO ]: Interpolant automaton has 33 states. [2018-06-22 15:52:21,196 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 15:52:21,196 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 15:52:21,205 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:52:21 BoogieIcfgContainer [2018-06-22 15:52:21,205 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:52:21,206 INFO ]: Toolchain (without parser) took 38312.33 ms. Allocated memory was 309.3 MB in the beginning and 699.9 MB in the end (delta: 390.6 MB). Free memory was 257.7 MB in the beginning and 435.6 MB in the end (delta: -177.9 MB). Peak memory consumption was 212.7 MB. Max. memory is 3.6 GB. [2018-06-22 15:52:21,207 INFO ]: SmtParser took 0.09 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 15:52:21,207 INFO ]: ChcToBoogie took 50.03 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 255.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:52:21,207 INFO ]: Boogie Preprocessor took 60.48 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 253.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:52:21,208 INFO ]: RCFGBuilder took 363.54 ms. Allocated memory is still 309.3 MB. Free memory was 253.7 MB in the beginning and 237.7 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:52:21,208 INFO ]: TraceAbstraction took 37826.64 ms. Allocated memory was 309.3 MB in the beginning and 699.9 MB in the end (delta: 390.6 MB). Free memory was 237.7 MB in the beginning and 435.6 MB in the end (delta: -197.9 MB). Peak memory consumption was 192.7 MB. Max. memory is 3.6 GB. [2018-06-22 15:52:21,210 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 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 50.03 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 255.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 60.48 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 253.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 363.54 ms. Allocated memory is still 309.3 MB. Free memory was 253.7 MB in the beginning and 237.7 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 37826.64 ms. Allocated memory was 309.3 MB in the beginning and 699.9 MB in the end (delta: 390.6 MB). Free memory was 237.7 MB in the beginning and 435.6 MB in the end (delta: -197.9 MB). Peak memory consumption was 192.7 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, 37.7s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 16.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 74 SDtfs, 268 SDslu, 419 SDs, 0 SdLazy, 360 SolverSat, 340 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 29.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 19.2s InterpolantComputationTime, 293 NumberOfCodeBlocks, 293 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 280 ConstructedInterpolants, 0 QuantifiedInterpolants, 121804 SizeOfPredicates, 262 NumberOfNonLiveVariables, 3422 ConjunctsInSsa, 336 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 127/460 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/car_2_e8_491_e7_826.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-52-21-222.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/car_2_e8_491_e7_826.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-52-21-222.csv Received shutdown request...