java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:24:30,908 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:24:30,910 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:24:30,925 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:24:30,925 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:24:30,926 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:24:30,928 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:24:30,930 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:24:30,932 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:24:30,933 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:24:30,934 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:24:30,935 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:24:30,936 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:24:30,937 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:24:30,937 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:24:30,941 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:24:30,943 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:24:30,957 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:24:30,958 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:24:30,959 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:24:30,960 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:24:30,962 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:24:30,963 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:24:30,963 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:24:30,964 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:24:30,964 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:24:30,971 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:24:30,971 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:24:30,972 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:24:30,973 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:24:30,977 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:24:30,978 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:24:30,978 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:24:30,979 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:24:30,979 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:24:30,979 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:24:30,999 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:24:30,999 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:24:30,999 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:24:31,000 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:24:31,001 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:24:31,001 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:24:31,002 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:24:31,002 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:24:31,002 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:24:31,002 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:24:31,003 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:24:31,003 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:24:31,003 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:24:31,003 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:24:31,003 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:24:31,003 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:24:31,004 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:24:31,004 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:24:31,004 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:24:31,006 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:24:31,006 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:24:31,059 INFO ]: Repository-Root is: /tmp [2018-06-22 14:24:31,076 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:24:31,081 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:24:31,082 INFO ]: Initializing SmtParser... [2018-06-22 14:24:31,083 INFO ]: SmtParser initialized [2018-06-22 14:24:31,083 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-2.smt2 [2018-06-22 14:24:31,084 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 14:24:31,175 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-2.smt2 unknown [2018-06-22 14:24:31,658 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-2.smt2 [2018-06-22 14:24:31,663 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:24:31,669 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:24:31,669 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:24:31,669 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:24:31,669 INFO ]: ChcToBoogie initialized [2018-06-22 14:24:31,677 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:24:31" (1/1) ... [2018-06-22 14:24:31,771 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:24:31 Unit [2018-06-22 14:24:31,771 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:24:31,772 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:24:31,772 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:24:31,772 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:24:31,792 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:24:31" (1/1) ... [2018-06-22 14:24:31,792 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:24:31" (1/1) ... [2018-06-22 14:24:31,801 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:24:31" (1/1) ... [2018-06-22 14:24:31,801 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:24:31" (1/1) ... [2018-06-22 14:24:31,813 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:24:31" (1/1) ... [2018-06-22 14:24:31,814 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:24:31" (1/1) ... [2018-06-22 14:24:31,817 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:24:31" (1/1) ... [2018-06-22 14:24:31,822 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:24:31,823 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:24:31,823 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:24:31,823 INFO ]: RCFGBuilder initialized [2018-06-22 14:24:31,824 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:24:31" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 14:24:31,849 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:24:31,849 INFO ]: Found specification of procedure False [2018-06-22 14:24:31,849 INFO ]: Found implementation of procedure False [2018-06-22 14:24:31,849 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:24:31,849 INFO ]: Found specification of procedure state [2018-06-22 14:24:31,849 INFO ]: Found implementation of procedure state [2018-06-22 14:24:31,849 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:24:31,849 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:24:31,849 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:24:32,219 INFO ]: Using library mode [2018-06-22 14:24:32,219 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:24:32 BoogieIcfgContainer [2018-06-22 14:24:32,220 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:24:32,221 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:24:32,221 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:24:32,226 INFO ]: TraceAbstraction initialized [2018-06-22 14:24:32,226 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:24:31" (1/3) ... [2018-06-22 14:24:32,227 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f3e372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:24:32, skipping insertion in model container [2018-06-22 14:24:32,227 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:24:31" (2/3) ... [2018-06-22 14:24:32,227 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f3e372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:24:32, skipping insertion in model container [2018-06-22 14:24:32,228 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:24:32" (3/3) ... [2018-06-22 14:24:32,230 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:24:32,240 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:24:32,247 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:24:32,281 INFO ]: Using default assertion order modulation [2018-06-22 14:24:32,282 INFO ]: Interprodecural is true [2018-06-22 14:24:32,282 INFO ]: Hoare is false [2018-06-22 14:24:32,282 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:24:32,282 INFO ]: Backedges is TWOTRACK [2018-06-22 14:24:32,282 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:24:32,282 INFO ]: Difference is false [2018-06-22 14:24:32,282 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:24:32,282 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:24:32,296 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:24:32,310 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:24:32,311 INFO ]: Found error trace [2018-06-22 14:24:32,312 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:24:32,312 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:24:32,317 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:24:32,319 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:24:32,319 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:24:32,357 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:32,357 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:24:32,357 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:32,397 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:32,535 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:24:32,537 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:24:32,537 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:24:32,539 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:24:32,551 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:24:32,552 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:24:32,553 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:24:32,645 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:24:32,645 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:24:32,645 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:24:32,646 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:24:32,646 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:24:32,655 INFO ]: With dead ends: 13 [2018-06-22 14:24:32,655 INFO ]: Without dead ends: 13 [2018-06-22 14:24:32,656 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:24:32,670 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:24:32,691 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:24:32,693 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:24:32,693 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:24:32,694 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:24:32,695 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:24:32,695 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:24:32,695 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:24:32,695 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:24:32,696 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:24:32,696 INFO ]: Found error trace [2018-06-22 14:24:32,696 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:24:32,696 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:24:32,696 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:24:32,696 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:24:32,696 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:24:32,697 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:32,697 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:24:32,697 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:32,818 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:33,138 WARN ]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 14:24:33,268 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:24:33,268 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:24:33,268 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:24:33,275 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:24:33,337 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:33,348 INFO ]: Computing forward predicates... [2018-06-22 14:24:35,001 WARN ]: Spent 971.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2018-06-22 14:24:35,195 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:24:35,218 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:24:35,218 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:24:35,219 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:24:35,219 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:24:35,219 INFO ]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:24:35,219 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:24:35,444 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:24:35,445 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:24:35,446 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:24:35,446 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:24:35,446 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:24:35,446 INFO ]: With dead ends: 15 [2018-06-22 14:24:35,446 INFO ]: Without dead ends: 15 [2018-06-22 14:24:35,447 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:24:35,447 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:24:35,450 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:24:35,450 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:24:35,450 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:24:35,451 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:24:35,451 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:24:35,451 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:24:35,451 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:24:35,451 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:24:35,451 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:24:35,451 INFO ]: Found error trace [2018-06-22 14:24:35,451 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:24:35,452 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:24:35,452 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:24:35,452 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:24:35,452 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:24:35,453 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:35,453 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:24:35,453 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:35,548 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:35,860 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:24:36,055 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:24:36,056 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:24:36,056 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:24:36,061 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:24:36,149 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:24:36,149 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:36,157 INFO ]: Computing forward predicates... [2018-06-22 14:24:36,817 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2018-06-22 14:24:37,413 WARN ]: Spent 295.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2018-06-22 14:24:37,617 INFO ]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:24:37,651 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:24:37,651 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 14:24:37,652 INFO ]: Interpolant automaton has 12 states [2018-06-22 14:24:37,652 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 14:24:37,652 INFO ]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:24:37,652 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 14:24:37,833 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:24:37,833 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:24:37,834 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:24:37,834 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 14:24:37,834 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:24:37,835 INFO ]: With dead ends: 17 [2018-06-22 14:24:37,835 INFO ]: Without dead ends: 17 [2018-06-22 14:24:37,835 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2018-06-22 14:24:37,835 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:24:37,839 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:24:37,839 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:24:37,840 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:24:37,840 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:24:37,840 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:24:37,840 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:24:37,840 INFO ]: Interpolant automaton has 12 states. [2018-06-22 14:24:37,840 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:24:37,840 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:24:37,840 INFO ]: Found error trace [2018-06-22 14:24:37,840 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:24:37,840 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:24:37,841 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:24:37,841 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:24:37,841 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:24:37,841 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:37,841 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:24:37,841 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:37,990 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:38,616 WARN ]: Spent 200.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2018-06-22 14:24:38,800 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:24:38,800 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:24:38,801 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:24:38,813 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:24:38,933 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:24:38,933 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:38,941 INFO ]: Computing forward predicates... [2018-06-22 14:24:39,327 WARN ]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2018-06-22 14:24:42,693 WARN ]: Spent 2.66 s on a formula simplification. DAG size of input: 215 DAG size of output: 77 [2018-06-22 14:24:45,271 WARN ]: Spent 1.85 s on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2018-06-22 14:24:46,250 WARN ]: Spent 525.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 16 [2018-06-22 14:24:46,310 INFO ]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:24:46,343 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:24:46,343 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 14:24:46,343 INFO ]: Interpolant automaton has 16 states [2018-06-22 14:24:46,344 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 14:24:46,344 INFO ]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:24:46,344 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 14:24:47,145 WARN ]: Spent 589.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2018-06-22 14:24:47,467 WARN ]: Spent 285.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 20 [2018-06-22 14:24:47,720 WARN ]: Spent 227.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 39 [2018-06-22 14:24:48,389 WARN ]: Spent 592.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2018-06-22 14:24:48,427 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:24:48,427 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:24:48,428 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:24:48,428 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 14:24:48,428 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:24:48,428 INFO ]: With dead ends: 19 [2018-06-22 14:24:48,429 INFO ]: Without dead ends: 19 [2018-06-22 14:24:48,429 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:24:48,429 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:24:48,432 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:24:48,432 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:24:48,432 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:24:48,432 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:24:48,432 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:24:48,432 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:24:48,432 INFO ]: Interpolant automaton has 16 states. [2018-06-22 14:24:48,433 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:24:48,433 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:24:48,433 INFO ]: Found error trace [2018-06-22 14:24:48,433 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:24:48,433 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:24:48,433 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 14:24:48,433 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:24:48,434 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:24:48,435 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:48,435 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:24:48,435 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:48,592 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:48,950 WARN ]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:24:49,717 WARN ]: Spent 714.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2018-06-22 14:24:50,227 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:24:50,228 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:24:50,228 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:24:50,234 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:24:50,389 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:24:50,389 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:50,403 INFO ]: Computing forward predicates... [2018-06-22 14:24:51,368 WARN ]: Spent 505.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2018-06-22 14:24:52,311 WARN ]: Spent 377.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2018-06-22 14:24:53,031 WARN ]: Spent 395.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 67 [2018-06-22 14:24:53,937 WARN ]: Spent 537.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 50 [2018-06-22 14:24:54,036 INFO ]: Checked inductivity of 36 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:24:54,057 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:24:54,057 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2018-06-22 14:24:54,057 INFO ]: Interpolant automaton has 18 states [2018-06-22 14:24:54,057 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 14:24:54,057 INFO ]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-06-22 14:24:54,057 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2018-06-22 14:24:54,478 WARN ]: Spent 364.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2018-06-22 14:24:54,860 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2018-06-22 14:24:55,166 WARN ]: Spent 251.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2018-06-22 14:24:55,201 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:24:55,201 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:24:55,204 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:24:55,204 INFO ]: Start accepts. Automaton has 18 states. Word has length 25 [2018-06-22 14:24:55,204 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:24:55,205 INFO ]: With dead ends: 21 [2018-06-22 14:24:55,205 INFO ]: Without dead ends: 21 [2018-06-22 14:24:55,205 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2018-06-22 14:24:55,206 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:24:55,208 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:24:55,208 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:24:55,209 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:24:55,209 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:24:55,209 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:24:55,209 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:24:55,209 INFO ]: Interpolant automaton has 18 states. [2018-06-22 14:24:55,209 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:24:55,210 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:24:55,210 INFO ]: Found error trace [2018-06-22 14:24:55,210 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:24:55,210 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:24:55,210 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 14:24:55,210 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:24:55,210 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:24:55,211 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:55,211 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:24:55,211 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:24:55,454 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:56,292 WARN ]: Spent 299.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 54 [2018-06-22 14:24:56,703 WARN ]: Spent 375.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 72 [2018-06-22 14:24:57,116 WARN ]: Spent 387.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 86 [2018-06-22 14:24:57,486 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 41 [2018-06-22 14:24:57,726 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 38 [2018-06-22 14:24:57,800 INFO ]: Checked inductivity of 55 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:24:57,800 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:24:57,800 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 14:24:57,808 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:24:57,998 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:24:57,998 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:24:58,019 INFO ]: Computing forward predicates... [2018-06-22 14:25:06,352 WARN ]: Spent 6.67 s on a formula simplification. DAG size of input: 1082 DAG size of output: 273 [2018-06-22 14:25:10,001 WARN ]: Spent 3.31 s on a formula simplification. DAG size of input: 657 DAG size of output: 182 [2018-06-22 14:25:12,135 WARN ]: Spent 1.81 s on a formula simplification. DAG size of input: 477 DAG size of output: 162 [2018-06-22 14:25:13,197 WARN ]: Spent 675.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 94 [2018-06-22 14:25:13,552 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 42 [2018-06-22 14:25:13,580 INFO ]: Checked inductivity of 55 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-06-22 14:25:13,602 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:25:13,602 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2018-06-22 14:25:13,602 INFO ]: Interpolant automaton has 22 states [2018-06-22 14:25:13,602 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 14:25:13,602 INFO ]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2018-06-22 14:25:13,603 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 22 states. [2018-06-22 14:25:16,969 WARN ]: Spent 3.30 s on a formula simplification. DAG size of input: 386 DAG size of output: 272 [2018-06-22 14:25:17,635 WARN ]: Spent 567.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 61 [2018-06-22 14:25:18,244 WARN ]: Spent 530.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 83 [2018-06-22 14:25:18,826 WARN ]: Spent 498.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 82 [2018-06-22 14:25:18,827 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:25:18,846 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 14:25:18,846 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:25:18,846 INFO ]: Start accepts. Automaton has 22 states. Word has length 29 [2018-06-22 14:25:18,846 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:25:18,846 INFO ]: With dead ends: 13 [2018-06-22 14:25:18,846 INFO ]: Without dead ends: 0 [2018-06-22 14:25:18,847 INFO ]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2018-06-22 14:25:18,847 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 14:25:18,847 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 14:25:18,847 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 14:25:18,847 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 14:25:18,847 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2018-06-22 14:25:18,847 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:25:18,847 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 14:25:18,847 INFO ]: Interpolant automaton has 22 states. [2018-06-22 14:25:18,847 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 14:25:18,847 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 14:25:18,851 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:25:18 BoogieIcfgContainer [2018-06-22 14:25:18,851 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:25:18,852 INFO ]: Toolchain (without parser) took 47189.07 ms. Allocated memory was 306.2 MB in the beginning and 984.1 MB in the end (delta: 677.9 MB). Free memory was 244.6 MB in the beginning and 861.9 MB in the end (delta: -617.3 MB). Peak memory consumption was 697.2 MB. Max. memory is 3.6 GB. [2018-06-22 14:25:18,853 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:25:18,853 INFO ]: ChcToBoogie took 101.94 ms. Allocated memory is still 306.2 MB. Free memory was 244.6 MB in the beginning and 241.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:25:18,853 INFO ]: Boogie Preprocessor took 50.67 ms. Allocated memory is still 306.2 MB. Free memory was 241.6 MB in the beginning and 239.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:25:18,854 INFO ]: RCFGBuilder took 396.79 ms. Allocated memory is still 306.2 MB. Free memory was 239.6 MB in the beginning and 216.6 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:25:18,854 INFO ]: TraceAbstraction took 46630.68 ms. Allocated memory was 306.2 MB in the beginning and 984.1 MB in the end (delta: 677.9 MB). Free memory was 215.6 MB in the beginning and 861.9 MB in the end (delta: -646.3 MB). Peak memory consumption was 668.2 MB. Max. memory is 3.6 GB. [2018-06-22 14:25:18,856 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 101.94 ms. Allocated memory is still 306.2 MB. Free memory was 244.6 MB in the beginning and 241.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 50.67 ms. Allocated memory is still 306.2 MB. Free memory was 241.6 MB in the beginning and 239.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 396.79 ms. Allocated memory is still 306.2 MB. Free memory was 239.6 MB in the beginning and 216.6 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 46630.68 ms. Allocated memory was 306.2 MB in the beginning and 984.1 MB in the end (delta: 677.9 MB). Free memory was 215.6 MB in the beginning and 861.9 MB in the end (delta: -646.3 MB). Peak memory consumption was 668.2 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, 46.5s OverallTime, 6 OverallIterations, 6 TraceHistogramMax, 9.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 67 SDtfs, 92 SDslu, 244 SDs, 0 SdLazy, 203 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 170 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 37.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=5, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 35.8s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 285948 SizeOfPredicates, 1316 NumberOfNonLiveVariables, 1775 ConjunctsInSsa, 260 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 107/250 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/simple_array_inversion-2.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-25-18-865.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-2.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-25-18-865.csv Received shutdown request...