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_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 04:43:44,403 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:43:44,405 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:43:44,416 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:43:44,417 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:43:44,418 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:43:44,419 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:43:44,421 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:43:44,423 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:43:44,423 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:43:44,424 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:43:44,425 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:43:44,425 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:43:44,427 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:43:44,427 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:43:44,428 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:43:44,430 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:43:44,432 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:43:44,434 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:43:44,435 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:43:44,436 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:43:44,438 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:43:44,439 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:43:44,439 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:43:44,440 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:43:44,441 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:43:44,442 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:43:44,443 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:43:44,444 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:43:44,444 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:43:44,445 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:43:44,446 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:43:44,446 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:43:44,447 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:43:44,447 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:43:44,448 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:43:44,462 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:43:44,462 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:43:44,462 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:43:44,463 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:43:44,464 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:43:44,464 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:43:44,464 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:43:44,465 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:43:44,465 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:43:44,465 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:43:44,466 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:43:44,466 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:43:44,466 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:43:44,466 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:43:44,466 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:43:44,467 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:43:44,467 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:43:44,468 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:43:44,469 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:43:44,517 INFO ]: Repository-Root is: /tmp [2018-06-22 04:43:44,531 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:43:44,534 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:43:44,535 INFO ]: Initializing SmtParser... [2018-06-22 04:43:44,536 INFO ]: SmtParser initialized [2018-06-22 04:43:44,536 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-2.smt2 [2018-06-22 04:43:44,538 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 04:43:44,617 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-2.smt2 unknown [2018-06-22 04:43:45,180 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-2.smt2 [2018-06-22 04:43:45,185 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:43:45,191 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:43:45,191 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:43:45,191 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:43:45,191 INFO ]: ChcToBoogie initialized [2018-06-22 04:43:45,194 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:43:45" (1/1) ... [2018-06-22 04:43:45,264 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:43:45 Unit [2018-06-22 04:43:45,264 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:43:45,265 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:43:45,265 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:43:45,265 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:43:45,286 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:43:45" (1/1) ... [2018-06-22 04:43:45,286 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:43:45" (1/1) ... [2018-06-22 04:43:45,307 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:43:45" (1/1) ... [2018-06-22 04:43:45,308 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:43:45" (1/1) ... [2018-06-22 04:43:45,333 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:43:45" (1/1) ... [2018-06-22 04:43:45,334 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:43:45" (1/1) ... [2018-06-22 04:43:45,337 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:43:45" (1/1) ... [2018-06-22 04:43:45,341 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:43:45,341 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:43:45,342 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:43:45,342 INFO ]: RCFGBuilder initialized [2018-06-22 04:43:45,342 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:43:45" (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 04:43:45,374 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:43:45,374 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:43:45,374 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:43:45,374 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:43:45,374 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:43:45,374 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 04:43:45,825 INFO ]: Using library mode [2018-06-22 04:43:45,827 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:43:45 BoogieIcfgContainer [2018-06-22 04:43:45,828 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:43:45,829 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:43:45,829 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:43:45,837 INFO ]: TraceAbstraction initialized [2018-06-22 04:43:45,838 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:43:45" (1/3) ... [2018-06-22 04:43:45,839 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea2bb97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:43:45, skipping insertion in model container [2018-06-22 04:43:45,839 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:43:45" (2/3) ... [2018-06-22 04:43:45,839 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea2bb97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:43:45, skipping insertion in model container [2018-06-22 04:43:45,839 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:43:45" (3/3) ... [2018-06-22 04:43:45,841 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:43:45,851 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:43:45,861 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:43:45,919 INFO ]: Using default assertion order modulation [2018-06-22 04:43:45,920 INFO ]: Interprodecural is true [2018-06-22 04:43:45,920 INFO ]: Hoare is false [2018-06-22 04:43:45,920 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:43:45,920 INFO ]: Backedges is TWOTRACK [2018-06-22 04:43:45,920 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:43:45,920 INFO ]: Difference is false [2018-06-22 04:43:45,920 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:43:45,920 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:43:45,938 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:43:45,955 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:43:45,955 INFO ]: Found error trace [2018-06-22 04:43:45,956 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:43:45,956 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:43:45,961 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 04:43:45,964 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:43:45,965 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:43:46,002 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:43:46,003 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:43:46,003 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:43:46,072 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:43:46,156 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:43:46,158 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:43:46,159 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:43:46,161 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:43:46,174 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:43:46,175 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:43:46,178 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:43:46,258 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:43:46,258 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:43:46,260 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:43:46,262 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:43:46,262 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:43:46,272 INFO ]: With dead ends: 9 [2018-06-22 04:43:46,272 INFO ]: Without dead ends: 9 [2018-06-22 04:43:46,274 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:43:46,288 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:43:46,314 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:43:46,315 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:43:46,316 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:43:46,323 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:43:46,323 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:43:46,323 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:43:46,323 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:43:46,323 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:43:46,323 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:43:46,323 INFO ]: Found error trace [2018-06-22 04:43:46,323 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:43:46,323 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:43:46,324 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 04:43:46,324 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:43:46,324 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:43:46,325 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:43:46,325 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:43:46,325 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:43:46,477 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:43:46,738 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:43:46,738 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:43:46,738 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 04:43:46,753 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:43:46,871 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:43:46,885 INFO ]: Computing forward predicates... [2018-06-22 04:43:48,058 WARN ]: Spent 392.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2018-06-22 04:43:48,070 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:43:48,092 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:43:48,092 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 04:43:48,092 INFO ]: Interpolant automaton has 6 states [2018-06-22 04:43:48,093 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 04:43:48,093 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:43:48,093 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 04:43:48,279 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 6 [2018-06-22 04:43:48,411 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:43:48,411 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 04:43:48,412 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 04:43:48,412 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 04:43:48,412 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:43:48,413 INFO ]: With dead ends: 11 [2018-06-22 04:43:48,413 INFO ]: Without dead ends: 11 [2018-06-22 04:43:48,414 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-06-22 04:43:48,414 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 04:43:48,415 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 04:43:48,415 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 04:43:48,415 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 04:43:48,416 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 04:43:48,416 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:43:48,416 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 04:43:48,416 INFO ]: Interpolant automaton has 6 states. [2018-06-22 04:43:48,416 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 04:43:48,416 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 04:43:48,416 INFO ]: Found error trace [2018-06-22 04:43:48,416 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:43:48,416 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:43:48,416 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-22 04:43:48,416 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:43:48,416 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:43:48,420 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:43:48,420 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:43:48,420 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:43:48,653 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:43:49,061 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:43:49,062 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:43:49,062 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 04:43:49,068 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 04:43:49,212 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:43:49,212 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:43:49,221 INFO ]: Computing forward predicates... [2018-06-22 04:43:51,720 WARN ]: Spent 274.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 20 [2018-06-22 04:43:53,769 WARN ]: Spent 1.13 s on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2018-06-22 04:43:53,788 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:43:53,824 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:43:53,824 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 04:43:53,824 INFO ]: Interpolant automaton has 10 states [2018-06-22 04:43:53,825 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 04:43:53,825 INFO ]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-06-22 04:43:53,825 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 04:43:54,444 WARN ]: Spent 543.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 7 [2018-06-22 04:43:54,730 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:43:54,730 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 04:43:54,730 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 04:43:54,730 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 04:43:54,730 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:43:54,730 INFO ]: With dead ends: 13 [2018-06-22 04:43:54,730 INFO ]: Without dead ends: 13 [2018-06-22 04:43:54,731 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-06-22 04:43:54,731 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 04:43:54,732 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 04:43:54,732 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 04:43:54,733 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 04:43:54,733 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 04:43:54,733 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:43:54,733 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 04:43:54,733 INFO ]: Interpolant automaton has 10 states. [2018-06-22 04:43:54,733 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 04:43:54,734 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 04:43:54,734 INFO ]: Found error trace [2018-06-22 04:43:54,734 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:43:54,734 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:43:54,734 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 3 times [2018-06-22 04:43:54,734 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:43:54,734 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:43:54,735 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:43:54,735 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:43:54,735 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:43:55,137 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:43:56,349 WARN ]: Spent 598.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 6 [2018-06-22 04:43:56,839 WARN ]: Spent 401.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 44 [2018-06-22 04:43:57,119 WARN ]: Spent 265.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 43 [2018-06-22 04:43:57,225 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:43:57,225 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:43:57,225 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 04:43:57,243 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 04:43:57,458 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 04:43:57,458 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:43:57,471 INFO ]: Computing forward predicates... [2018-06-22 04:43:59,129 WARN ]: Spent 1.13 s on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2018-06-22 04:44:02,910 WARN ]: Spent 2.23 s on a formula simplification. DAG size of input: 339 DAG size of output: 88 Received shutdown request... [2018-06-22 04:44:43,403 WARN ]: Removed 278 from assertion stack [2018-06-22 04:44:43,404 INFO ]: Timeout while computing interpolants [2018-06-22 04:44:43,604 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:44:43,604 WARN ]: Verification canceled [2018-06-22 04:44:43,609 WARN ]: Timeout [2018-06-22 04:44:43,609 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 04:44:43 BoogieIcfgContainer [2018-06-22 04:44:43,609 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 04:44:43,610 INFO ]: Toolchain (without parser) took 58424.36 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.2 MB in the beginning and 877.4 MB in the end (delta: -630.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 04:44:43,611 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 04:44:43,611 INFO ]: ChcToBoogie took 73.46 ms. Allocated memory is still 308.8 MB. Free memory was 247.2 MB in the beginning and 243.2 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-22 04:44:43,611 INFO ]: Boogie Preprocessor took 76.02 ms. Allocated memory is still 308.8 MB. Free memory was 243.2 MB in the beginning and 241.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 04:44:43,612 INFO ]: RCFGBuilder took 486.13 ms. Allocated memory is still 308.8 MB. Free memory was 241.2 MB in the beginning and 213.3 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 3.6 GB. [2018-06-22 04:44:43,612 INFO ]: TraceAbstraction took 57779.44 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 213.3 MB in the beginning and 877.4 MB in the end (delta: -664.1 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 04:44:43,618 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 73.46 ms. Allocated memory is still 308.8 MB. Free memory was 247.2 MB in the beginning and 243.2 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 76.02 ms. Allocated memory is still 308.8 MB. Free memory was 243.2 MB in the beginning and 241.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 486.13 ms. Allocated memory is still 308.8 MB. Free memory was 241.2 MB in the beginning and 213.3 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 3.6 GB. * TraceAbstraction took 57779.44 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 213.3 MB in the beginning and 877.4 MB in the end (delta: -664.1 MB). Peak memory consumption was 1.2 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 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 1540. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 57.7s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 1 SDslu, 44 SDs, 0 SdLazy, 22 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1214 SizeOfPredicates, 8 NumberOfNonLiveVariables, 682 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/14 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-2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_04-44-43-629.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_04-44-43-629.csv Completed graceful shutdown