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-8.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:27:24,875 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:27:24,878 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:27:24,892 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:27:24,893 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:27:24,893 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:27:24,897 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:27:24,899 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:27:24,901 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:27:24,901 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:27:24,903 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:27:24,904 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:27:24,904 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:27:24,905 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:27:24,906 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:27:24,909 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:27:24,910 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:27:24,923 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:27:24,925 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:27:24,926 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:27:24,927 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:27:24,929 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:27:24,929 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:27:24,929 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:27:24,930 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:27:24,931 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:27:24,937 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:27:24,938 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:27:24,939 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:27:24,939 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:27:24,940 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:27:24,940 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:27:24,940 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:27:24,941 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:27:24,942 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:27:24,947 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 14:27:24,967 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:27:24,967 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:27:24,967 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:27:24,967 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:27:24,969 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:27:24,969 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:27:24,969 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:27:24,969 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:27:24,970 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:27:24,970 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:27:24,970 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:27:24,970 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:27:24,970 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:27:24,970 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:27:24,971 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:27:24,971 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:27:24,971 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:27:24,971 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:27:24,971 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:27:24,973 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:27:24,974 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:27:25,018 INFO ]: Repository-Root is: /tmp [2018-06-22 14:27:25,034 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:27:25,037 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:27:25,039 INFO ]: Initializing SmtParser... [2018-06-22 14:27:25,039 INFO ]: SmtParser initialized [2018-06-22 14:27:25,040 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-8.smt2 [2018-06-22 14:27:25,041 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 14:27:25,126 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-8.smt2 unknown [2018-06-22 14:27:26,110 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-8.smt2 [2018-06-22 14:27:26,114 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:27:26,130 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:27:26,130 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:27:26,130 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:27:26,130 INFO ]: ChcToBoogie initialized [2018-06-22 14:27:26,133 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:27:26" (1/1) ... [2018-06-22 14:27:26,216 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:26 Unit [2018-06-22 14:27:26,217 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:27:26,217 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:27:26,217 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:27:26,217 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:27:26,249 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:26" (1/1) ... [2018-06-22 14:27:26,249 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:26" (1/1) ... [2018-06-22 14:27:26,281 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:26" (1/1) ... [2018-06-22 14:27:26,281 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:26" (1/1) ... [2018-06-22 14:27:26,361 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:26" (1/1) ... [2018-06-22 14:27:26,362 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:26" (1/1) ... [2018-06-22 14:27:26,375 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:26" (1/1) ... [2018-06-22 14:27:26,388 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:27:26,389 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:27:26,389 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:27:26,389 INFO ]: RCFGBuilder initialized [2018-06-22 14:27:26,390 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:26" (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 14:27:26,402 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:27:26,402 INFO ]: Found specification of procedure False [2018-06-22 14:27:26,402 INFO ]: Found implementation of procedure False [2018-06-22 14:27:26,402 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:27:26,402 INFO ]: Found specification of procedure state [2018-06-22 14:27:26,402 INFO ]: Found implementation of procedure state [2018-06-22 14:27:26,402 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:27:26,402 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:27:26,402 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 14:27:27,295 INFO ]: Using library mode [2018-06-22 14:27:27,295 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:27:27 BoogieIcfgContainer [2018-06-22 14:27:27,295 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:27:27,297 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:27:27,297 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:27:27,300 INFO ]: TraceAbstraction initialized [2018-06-22 14:27:27,300 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:27:26" (1/3) ... [2018-06-22 14:27:27,301 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2bd32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:27:27, skipping insertion in model container [2018-06-22 14:27:27,301 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:27:26" (2/3) ... [2018-06-22 14:27:27,301 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2bd32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:27:27, skipping insertion in model container [2018-06-22 14:27:27,302 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:27:27" (3/3) ... [2018-06-22 14:27:27,303 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:27:27,313 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:27:27,323 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:27:27,370 INFO ]: Using default assertion order modulation [2018-06-22 14:27:27,371 INFO ]: Interprodecural is true [2018-06-22 14:27:27,371 INFO ]: Hoare is false [2018-06-22 14:27:27,371 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:27:27,371 INFO ]: Backedges is TWOTRACK [2018-06-22 14:27:27,371 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:27:27,371 INFO ]: Difference is false [2018-06-22 14:27:27,371 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:27:27,371 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:27:27,387 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:27:27,404 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:27:27,404 INFO ]: Found error trace [2018-06-22 14:27:27,406 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:27:27,406 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:27:27,412 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:27:27,414 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:27:27,415 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:27:27,462 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:27:27,462 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:27:27,462 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:27:27,527 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:27:27,739 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:27:27,741 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:27:27,741 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:27:27,743 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:27:27,758 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:27:27,758 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:27:27,761 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:27:27,950 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:27:27,951 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:27:27,952 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:27:27,953 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:27:27,954 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:27:27,964 INFO ]: With dead ends: 13 [2018-06-22 14:27:27,964 INFO ]: Without dead ends: 13 [2018-06-22 14:27:27,966 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:27:27,983 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:27:28,021 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:27:28,023 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:27:28,023 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:27:28,024 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:27:28,024 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:27:28,024 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:27:28,024 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:27:28,024 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:27:28,026 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:27:28,026 INFO ]: Found error trace [2018-06-22 14:27:28,026 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:27:28,026 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:27:28,027 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:27:28,027 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:27:28,027 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:27:28,028 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:27:28,028 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:27:28,028 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:27:28,238 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:27:28,832 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:27:28,835 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:27:28,835 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:27:28,835 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 14:27:28,844 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:27:29,018 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:27:29,038 INFO ]: Computing forward predicates... [2018-06-22 14:27:31,804 WARN ]: Spent 1.03 s on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2018-06-22 14:27:32,053 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:27:32,084 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:27:32,084 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 14:27:32,085 INFO ]: Interpolant automaton has 8 states [2018-06-22 14:27:32,085 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 14:27:32,085 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 14:27:32,085 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 14:27:32,514 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2018-06-22 14:27:32,534 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:27:32,534 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:27:32,535 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:27:32,536 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 14:27:32,536 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:27:32,536 INFO ]: With dead ends: 17 [2018-06-22 14:27:32,536 INFO ]: Without dead ends: 17 [2018-06-22 14:27:32,537 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:27:32,537 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:27:32,540 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:27:32,540 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:27:32,540 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:27:32,540 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2018-06-22 14:27:32,541 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:27:32,541 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:27:32,541 INFO ]: Interpolant automaton has 8 states. [2018-06-22 14:27:32,541 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:27:32,541 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:27:32,541 INFO ]: Found error trace [2018-06-22 14:27:32,541 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:27:32,541 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:27:32,542 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 2 times [2018-06-22 14:27:32,542 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:27:32,542 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:27:32,542 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:27:32,542 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:27:32,542 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:27:33,057 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:27:33,936 WARN ]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:27:34,252 WARN ]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 14:27:34,529 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 21 [2018-06-22 14:27:34,725 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:27:34,725 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:27:34,725 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 14:27:34,740 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:27:35,054 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:27:35,055 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:27:35,076 INFO ]: Computing forward predicates... [2018-06-22 14:27:36,483 WARN ]: Spent 386.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2018-06-22 14:28:07,068 WARN ]: Spent 5.40 s on a formula simplification. DAG size of input: 572 DAG size of output: 135 Received shutdown request... [2018-06-22 14:28:28,332 INFO ]: Timeout while computing interpolants [2018-06-22 14:28:28,532 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:28:28,532 WARN ]: Verification canceled [2018-06-22 14:28:28,536 WARN ]: Timeout [2018-06-22 14:28:28,537 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:28:28 BoogieIcfgContainer [2018-06-22 14:28:28,537 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:28:28,538 INFO ]: Toolchain (without parser) took 62422.88 ms. Allocated memory was 325.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 281.2 MB in the beginning and 821.7 MB in the end (delta: -540.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 14:28:28,539 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 307.2 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:28:28,539 INFO ]: ChcToBoogie took 86.88 ms. Allocated memory is still 325.6 MB. Free memory was 279.6 MB in the beginning and 276.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:28:28,539 INFO ]: Boogie Preprocessor took 171.24 ms. Allocated memory is still 325.6 MB. Free memory was 276.5 MB in the beginning and 273.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:28:28,540 INFO ]: RCFGBuilder took 906.20 ms. Allocated memory was 325.6 MB in the beginning and 365.4 MB in the end (delta: 39.8 MB). Free memory was 273.4 MB in the beginning and 329.8 MB in the end (delta: -56.3 MB). Peak memory consumption was 101.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:28:28,540 INFO ]: TraceAbstraction took 61239.56 ms. Allocated memory was 365.4 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 329.8 MB in the beginning and 821.7 MB in the end (delta: -492.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 14:28:28,551 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 307.2 MB. Free memory is still 272.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 86.88 ms. Allocated memory is still 325.6 MB. Free memory was 279.6 MB in the beginning and 276.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 171.24 ms. Allocated memory is still 325.6 MB. Free memory was 276.5 MB in the beginning and 273.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 906.20 ms. Allocated memory was 325.6 MB in the beginning and 365.4 MB in the end (delta: 39.8 MB). Free memory was 273.4 MB in the beginning and 329.8 MB in the end (delta: -56.3 MB). Peak memory consumption was 101.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 61239.56 ms. Allocated memory was 365.4 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 329.8 MB in the beginning and 821.7 MB in the end (delta: -492.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 21 quantified variables from 3 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 61.1s OverallTime, 3 OverallIterations, 4 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 22 SDtfs, 6 SDslu, 38 SDs, 0 SdLazy, 26 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 4332 SizeOfPredicates, 228 NumberOfNonLiveVariables, 397 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 2/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-8.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-28-28-569.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-8.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-28-28-569.csv Completed graceful shutdown