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-9.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 04:47:12,749 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:47:12,752 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:47:12,763 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:47:12,764 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:47:12,765 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:47:12,766 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:47:12,768 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:47:12,770 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:47:12,770 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:47:12,771 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:47:12,772 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:47:12,772 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:47:12,773 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:47:12,774 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:47:12,777 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:47:12,779 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:47:12,783 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:47:12,785 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:47:12,786 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:47:12,787 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:47:12,789 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:47:12,789 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:47:12,790 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:47:12,790 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:47:12,791 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:47:12,792 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:47:12,793 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:47:12,794 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:47:12,794 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:47:12,795 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:47:12,795 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:47:12,796 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:47:12,796 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:47:12,797 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:47:12,797 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:47:12,811 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:47:12,811 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:47:12,811 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:47:12,811 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:47:12,812 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:47:12,813 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:47:12,813 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:47:12,813 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:47:12,813 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:47:12,814 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:47:12,814 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:47:12,814 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:47:12,814 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:47:12,814 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:47:12,815 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:47:12,815 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:47:12,815 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:47:12,816 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:47:12,817 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:47:12,856 INFO ]: Repository-Root is: /tmp [2018-06-22 04:47:12,876 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:47:12,880 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:47:12,882 INFO ]: Initializing SmtParser... [2018-06-22 04:47:12,882 INFO ]: SmtParser initialized [2018-06-22 04:47:12,883 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-9.smt2 [2018-06-22 04:47:12,884 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 04:47:12,978 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-9.smt2 unknown [2018-06-22 04:47:14,240 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-9.smt2 [2018-06-22 04:47:14,244 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:47:14,250 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:47:14,251 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:47:14,251 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:47:14,251 INFO ]: ChcToBoogie initialized [2018-06-22 04:47:14,254 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:47:14" (1/1) ... [2018-06-22 04:47:14,411 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:14 Unit [2018-06-22 04:47:14,412 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:47:14,412 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:47:14,412 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:47:14,412 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:47:14,434 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:14" (1/1) ... [2018-06-22 04:47:14,434 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:14" (1/1) ... [2018-06-22 04:47:14,461 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:14" (1/1) ... [2018-06-22 04:47:14,461 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:14" (1/1) ... [2018-06-22 04:47:14,502 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:14" (1/1) ... [2018-06-22 04:47:14,504 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:14" (1/1) ... [2018-06-22 04:47:14,512 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:14" (1/1) ... [2018-06-22 04:47:14,522 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:47:14,523 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:47:14,523 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:47:14,523 INFO ]: RCFGBuilder initialized [2018-06-22 04:47:14,523 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:14" (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 04:47:14,537 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:47:14,537 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:47:14,537 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:47:14,537 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:47:14,537 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:47:14,537 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 04:47:15,535 INFO ]: Using library mode [2018-06-22 04:47:15,536 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:47:15 BoogieIcfgContainer [2018-06-22 04:47:15,536 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:47:15,538 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:47:15,545 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:47:15,548 INFO ]: TraceAbstraction initialized [2018-06-22 04:47:15,548 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:47:14" (1/3) ... [2018-06-22 04:47:15,549 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f168fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:47:15, skipping insertion in model container [2018-06-22 04:47:15,549 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:47:14" (2/3) ... [2018-06-22 04:47:15,549 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11f168fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:47:15, skipping insertion in model container [2018-06-22 04:47:15,549 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:47:15" (3/3) ... [2018-06-22 04:47:15,553 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:47:15,563 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:47:15,573 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:47:15,626 INFO ]: Using default assertion order modulation [2018-06-22 04:47:15,627 INFO ]: Interprodecural is true [2018-06-22 04:47:15,627 INFO ]: Hoare is false [2018-06-22 04:47:15,627 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:47:15,627 INFO ]: Backedges is TWOTRACK [2018-06-22 04:47:15,627 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:47:15,627 INFO ]: Difference is false [2018-06-22 04:47:15,627 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:47:15,627 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:47:15,648 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:47:15,661 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:47:15,661 INFO ]: Found error trace [2018-06-22 04:47:15,662 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:47:15,663 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:47:15,668 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 04:47:15,670 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:47:15,670 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:47:15,717 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:15,717 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:47:15,717 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:15,843 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:47:16,001 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:47:16,004 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:47:16,004 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:47:16,006 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:47:16,021 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:47:16,022 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:47:16,024 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:47:16,194 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:47:16,194 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:47:16,196 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:47:16,198 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:47:16,198 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:47:16,208 INFO ]: With dead ends: 9 [2018-06-22 04:47:16,208 INFO ]: Without dead ends: 9 [2018-06-22 04:47:16,210 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 04:47:16,228 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:47:16,254 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:47:16,255 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:47:16,256 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:47:16,258 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:47:16,258 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:47:16,258 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:47:16,258 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:47:16,258 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:47:16,258 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:47:16,258 INFO ]: Found error trace [2018-06-22 04:47:16,258 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:47:16,258 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:47:16,258 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 04:47:16,259 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:47:16,259 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:47:16,259 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:16,259 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:47:16,259 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:16,555 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:47:17,102 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:47:17,103 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:47:17,103 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 04:47:17,110 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:47:17,418 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:47:17,437 INFO ]: Computing forward predicates... [2018-06-22 04:47:17,704 WARN ]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 04:47:19,164 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 15 [2018-06-22 04:47:19,168 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:47:19,193 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:47:19,193 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 04:47:19,194 INFO ]: Interpolant automaton has 6 states [2018-06-22 04:47:19,194 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 04:47:19,194 INFO ]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:47:19,194 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 04:47:19,282 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:47:19,282 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 04:47:19,285 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 04:47:19,285 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 04:47:19,285 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:47:19,285 INFO ]: With dead ends: 11 [2018-06-22 04:47:19,285 INFO ]: Without dead ends: 11 [2018-06-22 04:47:19,287 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:47:19,287 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 04:47:19,288 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 04:47:19,288 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 04:47:19,288 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 04:47:19,288 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 04:47:19,288 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:47:19,288 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 04:47:19,288 INFO ]: Interpolant automaton has 6 states. [2018-06-22 04:47:19,288 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 04:47:19,289 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 04:47:19,289 INFO ]: Found error trace [2018-06-22 04:47:19,289 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:47:19,289 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:47:19,289 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-22 04:47:19,289 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:47:19,289 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:47:19,290 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:19,290 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:47:19,290 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:47:19,870 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:47:20,741 WARN ]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 04:47:21,203 WARN ]: Spent 411.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2018-06-22 04:47:21,413 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 11 [2018-06-22 04:47:21,429 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:47:21,430 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:47:21,430 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 04:47:21,442 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 04:47:21,851 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:47:21,851 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:47:21,878 INFO ]: Computing forward predicates... [2018-06-22 04:47:24,241 WARN ]: Spent 174.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 15 [2018-06-22 04:47:53,545 WARN ]: Simplifying disjunction of 6294 conjuctions. This might take some time... [2018-06-22 04:47:55,967 INFO ]: Simplified to disjunction of 6294 conjuctions. [2018-06-22 04:47:55,994 WARN ]: Simplifying disjunction of 6295 conjuctions. This might take some time... [2018-06-22 04:48:00,584 INFO ]: Simplified to disjunction of 6295 conjuctions. [2018-06-22 04:48:00,622 WARN ]: Simplifying disjunction of 6299 conjuctions. This might take some time... [2018-06-22 04:48:03,359 INFO ]: Simplified to disjunction of 6299 conjuctions. [2018-06-22 04:48:03,388 WARN ]: Simplifying disjunction of 6307 conjuctions. This might take some time... [2018-06-22 04:48:05,592 INFO ]: Simplified to disjunction of 6307 conjuctions. [2018-06-22 04:48:16,019 WARN ]: Spent 3.23 s on a formula simplification. DAG size of input: 423 DAG size of output: 48 [2018-06-22 04:48:17,782 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:48:17,809 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:48:17,809 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 04:48:17,809 INFO ]: Interpolant automaton has 10 states [2018-06-22 04:48:17,810 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 04:48:17,810 INFO ]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-06-22 04:48:17,810 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 04:48:18,017 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:48:18,018 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 04:48:18,018 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 04:48:18,018 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 04:48:18,018 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:48:18,018 INFO ]: With dead ends: 13 [2018-06-22 04:48:18,018 INFO ]: Without dead ends: 13 [2018-06-22 04:48:18,018 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-06-22 04:48:18,019 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 04:48:18,020 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 04:48:18,020 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 04:48:18,020 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 04:48:18,020 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 04:48:18,020 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:48:18,020 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 04:48:18,020 INFO ]: Interpolant automaton has 10 states. [2018-06-22 04:48:18,020 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 04:48:18,021 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 04:48:18,021 INFO ]: Found error trace [2018-06-22 04:48:18,021 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:48:18,021 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:48:18,021 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 3 times [2018-06-22 04:48:18,021 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:48:18,021 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:48:18,022 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:48:18,022 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:48:18,022 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY Received shutdown request... [2018-06-22 04:48:18,176 INFO ]: Conjunction of SSA is unknown [2018-06-22 04:48:18,183 INFO ]: Advancing trace checker [2018-06-22 04:48:18,183 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 (exit command is (exit), workingDir is null) [2018-06-22 04:48:18,196 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-06-22 04:48:18,883 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 04:48:18,883 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:48:18,919 INFO ]: Computing forward predicates... [2018-06-22 04:48:18,921 INFO ]: Timeout while computing interpolants [2018-06-22 04:48:19,122 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-06-22 04:48:19,122 WARN ]: Verification canceled [2018-06-22 04:48:19,126 WARN ]: Timeout [2018-06-22 04:48:19,126 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 04:48:19 BoogieIcfgContainer [2018-06-22 04:48:19,126 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 04:48:19,127 INFO ]: Toolchain (without parser) took 64881.99 ms. Allocated memory was 332.9 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 260.7 MB in the beginning and 1.1 GB in the end (delta: -811.2 MB). Peak memory consumption was 318.7 MB. Max. memory is 3.6 GB. [2018-06-22 04:48:19,127 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 04:48:19,128 INFO ]: ChcToBoogie took 161.09 ms. Allocated memory is still 332.9 MB. Free memory was 258.3 MB in the beginning and 255.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 3.6 GB. [2018-06-22 04:48:19,128 INFO ]: Boogie Preprocessor took 109.77 ms. Allocated memory is still 332.9 MB. Free memory was 255.9 MB in the beginning and 251.1 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 3.6 GB. [2018-06-22 04:48:19,128 INFO ]: RCFGBuilder took 1013.52 ms. Allocated memory was 332.9 MB in the beginning and 378.0 MB in the end (delta: 45.1 MB). Free memory was 251.1 MB in the beginning and 275.6 MB in the end (delta: -24.5 MB). Peak memory consumption was 77.2 MB. Max. memory is 3.6 GB. [2018-06-22 04:48:19,129 INFO ]: TraceAbstraction took 63588.33 ms. Allocated memory was 378.0 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 275.6 MB in the beginning and 1.1 GB in the end (delta: -796.2 MB). Peak memory consumption was 288.5 MB. Max. memory is 3.6 GB. [2018-06-22 04:48:19,131 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 161.09 ms. Allocated memory is still 332.9 MB. Free memory was 258.3 MB in the beginning and 255.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 109.77 ms. Allocated memory is still 332.9 MB. Free memory was 255.9 MB in the beginning and 251.1 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 3.6 GB. * RCFGBuilder took 1013.52 ms. Allocated memory was 332.9 MB in the beginning and 378.0 MB in the end (delta: 45.1 MB). Free memory was 251.1 MB in the beginning and 275.6 MB in the end (delta: -24.5 MB). Peak memory consumption was 77.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63588.33 ms. Allocated memory was 378.0 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 275.6 MB in the beginning and 1.1 GB in the end (delta: -796.2 MB). Peak memory consumption was 288.5 MB. 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 XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 63.5s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 2 SDslu, 34 SDs, 0 SdLazy, 19 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 5.2s 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: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 59.9s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1853 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1718 ConjunctsInSsa, 52 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-9.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_04-48-19-148.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-9.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_04-48-19-148.csv Completed graceful shutdown