java -Xss4m -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-1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 12:19:55,977 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 12:19:55,981 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 12:19:55,995 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 12:19:55,995 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 12:19:55,996 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 12:19:56,000 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 12:19:56,002 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 12:19:56,004 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 12:19:56,004 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 12:19:56,005 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 12:19:56,005 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 12:19:56,006 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 12:19:56,007 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 12:19:56,008 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 12:19:56,008 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 12:19:56,010 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 12:19:56,012 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 12:19:56,013 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 12:19:56,014 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 12:19:56,015 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 12:19:56,017 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 12:19:56,018 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 12:19:56,018 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 12:19:56,019 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 12:19:56,019 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 12:19:56,020 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 12:19:56,021 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 12:19:56,022 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 12:19:56,022 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 12:19:56,023 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 12:19:56,023 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 12:19:56,023 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 12:19:56,024 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 12:19:56,025 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 12:19:56,025 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 12:19:56,039 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 12:19:56,039 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 12:19:56,039 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 12:19:56,040 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 12:19:56,041 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 12:19:56,041 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 12:19:56,041 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 12:19:56,041 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 12:19:56,041 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 12:19:56,042 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 12:19:56,042 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 12:19:56,042 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 12:19:56,042 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 12:19:56,043 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 12:19:56,043 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 12:19:56,043 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 12:19:56,043 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 12:19:56,043 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 12:19:56,044 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 12:19:56,044 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 12:19:56,044 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 12:19:56,045 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 12:19:56,045 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 12:19:56,090 INFO ]: Repository-Root is: /tmp [2018-06-25 12:19:56,109 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 12:19:56,113 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 12:19:56,115 INFO ]: Initializing SmtParser... [2018-06-25 12:19:56,115 INFO ]: SmtParser initialized [2018-06-25 12:19:56,115 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-1.smt2 [2018-06-25 12:19:56,117 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 [2018-06-25 12:19:56,214 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-1.smt2 unknown [2018-06-25 12:19:56,686 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-1.smt2 [2018-06-25 12:19:56,690 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 12:19:56,695 INFO ]: Walking toolchain with 4 elements. [2018-06-25 12:19:56,696 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 12:19:56,696 INFO ]: Initializing ChcToBoogie... [2018-06-25 12:19:56,696 INFO ]: ChcToBoogie initialized [2018-06-25 12:19:56,699 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:19:56" (1/1) ... [2018-06-25 12:19:56,753 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:19:56 Unit [2018-06-25 12:19:56,753 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 12:19:56,753 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 12:19:56,753 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 12:19:56,753 INFO ]: Boogie Preprocessor initialized [2018-06-25 12:19:56,773 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:19:56" (1/1) ... [2018-06-25 12:19:56,773 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:19:56" (1/1) ... [2018-06-25 12:19:56,793 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:19:56" (1/1) ... [2018-06-25 12:19:56,793 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:19:56" (1/1) ... [2018-06-25 12:19:56,810 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:19:56" (1/1) ... [2018-06-25 12:19:56,811 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:19:56" (1/1) ... [2018-06-25 12:19:56,814 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:19:56" (1/1) ... [2018-06-25 12:19:56,819 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 12:19:56,820 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 12:19:56,821 INFO ]: Initializing RCFGBuilder... [2018-06-25 12:19:56,821 INFO ]: RCFGBuilder initialized [2018-06-25 12:19:56,822 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:19:56" (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) [2018-06-25 12:19:56,839 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 12:19:56,839 INFO ]: Found specification of procedure gotoProc [2018-06-25 12:19:56,839 INFO ]: Found implementation of procedure gotoProc [2018-06-25 12:19:56,839 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 12:19:56,839 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 12:19:56,839 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 [2018-06-25 12:19:57,305 INFO ]: Using library mode [2018-06-25 12:19:57,306 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:19:57 BoogieIcfgContainer [2018-06-25 12:19:57,306 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 12:19:57,308 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 12:19:57,308 INFO ]: Initializing TraceAbstraction... [2018-06-25 12:19:57,311 INFO ]: TraceAbstraction initialized [2018-06-25 12:19:57,311 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:19:56" (1/3) ... [2018-06-25 12:19:57,312 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37624936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 12:19:57, skipping insertion in model container [2018-06-25 12:19:57,312 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:19:56" (2/3) ... [2018-06-25 12:19:57,312 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37624936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 12:19:57, skipping insertion in model container [2018-06-25 12:19:57,312 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:19:57" (3/3) ... [2018-06-25 12:19:57,314 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 12:19:57,323 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 12:19:57,332 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 12:19:57,381 INFO ]: Using default assertion order modulation [2018-06-25 12:19:57,382 INFO ]: Interprodecural is true [2018-06-25 12:19:57,382 INFO ]: Hoare is false [2018-06-25 12:19:57,382 INFO ]: Compute interpolants for FPandBP [2018-06-25 12:19:57,382 INFO ]: Backedges is TWOTRACK [2018-06-25 12:19:57,382 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 12:19:57,382 INFO ]: Difference is false [2018-06-25 12:19:57,382 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 12:19:57,382 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 12:19:57,400 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 12:19:57,414 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 12:19:57,414 INFO ]: Found error trace [2018-06-25 12:19:57,417 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:19:57,417 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:19:57,422 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 12:19:57,424 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:19:57,425 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:19:57,473 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:19:57,473 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:19:57,473 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:19:57,548 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:19:57,676 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:19:57,679 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 12:19:57,679 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 12:19:57,682 INFO ]: Interpolant automaton has 3 states [2018-06-25 12:19:57,696 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 12:19:57,697 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 12:19:57,700 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 12:19:57,782 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:19:57,782 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 12:19:57,783 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 12:19:57,784 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 12:19:57,784 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:19:57,791 INFO ]: With dead ends: 9 [2018-06-25 12:19:57,791 INFO ]: Without dead ends: 9 [2018-06-25 12:19:57,793 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 [2018-06-25 12:19:57,807 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 12:19:57,838 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 12:19:57,840 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 12:19:57,840 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 12:19:57,841 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 12:19:57,842 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:19:57,842 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 12:19:57,842 INFO ]: Interpolant automaton has 3 states. [2018-06-25 12:19:57,842 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 12:19:57,842 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 12:19:57,842 INFO ]: Found error trace [2018-06-25 12:19:57,842 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:19:57,842 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:19:57,842 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 12:19:57,842 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:19:57,842 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:19:57,844 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:19:57,844 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:19:57,844 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:19:57,952 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:19:58,170 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:19:58,170 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:19:58,170 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 [2018-06-25 12:19:58,201 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:19:58,309 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:19:58,321 INFO ]: Computing forward predicates... [2018-06-25 12:19:59,043 WARN ]: Spent 274.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-06-25 12:19:59,046 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:19:59,088 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:19:59,089 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 12:19:59,089 INFO ]: Interpolant automaton has 5 states [2018-06-25 12:19:59,089 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 12:19:59,089 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-25 12:19:59,089 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 12:19:59,204 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:19:59,204 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 12:19:59,207 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 12:19:59,208 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 12:19:59,208 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:19:59,208 INFO ]: With dead ends: 11 [2018-06-25 12:19:59,208 INFO ]: Without dead ends: 11 [2018-06-25 12:19:59,209 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-25 12:19:59,209 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 12:19:59,210 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 12:19:59,210 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 12:19:59,210 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 12:19:59,210 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 12:19:59,211 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:19:59,211 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 12:19:59,211 INFO ]: Interpolant automaton has 5 states. [2018-06-25 12:19:59,211 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 12:19:59,211 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 12:19:59,211 INFO ]: Found error trace [2018-06-25 12:19:59,211 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:19:59,211 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:19:59,211 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-25 12:19:59,211 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:19:59,211 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:19:59,212 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:19:59,212 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:19:59,212 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:19:59,446 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:19:59,772 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-25 12:20:00,067 WARN ]: Spent 242.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 8 [2018-06-25 12:20:00,353 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 12 [2018-06-25 12:20:00,360 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:20:00,361 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:20:00,361 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 [2018-06-25 12:20:00,371 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 12:20:00,517 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 12:20:00,518 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:20:00,527 INFO ]: Computing forward predicates... [2018-06-25 12:20:01,025 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-06-25 12:20:02,724 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 21 [2018-06-25 12:20:03,774 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2018-06-25 12:20:03,776 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:20:03,797 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:20:03,798 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-25 12:20:03,798 INFO ]: Interpolant automaton has 9 states [2018-06-25 12:20:03,798 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-25 12:20:03,798 INFO ]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-06-25 12:20:03,798 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2018-06-25 12:20:03,866 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:20:03,866 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 12:20:03,866 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 12:20:03,866 INFO ]: Start accepts. Automaton has 9 states. Word has length 10 [2018-06-25 12:20:03,866 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:20:03,866 INFO ]: With dead ends: 13 [2018-06-25 12:20:03,867 INFO ]: Without dead ends: 13 [2018-06-25 12:20:03,867 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-06-25 12:20:03,867 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 12:20:03,868 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 12:20:03,868 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 12:20:03,869 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 12:20:03,869 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-25 12:20:03,869 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:20:03,869 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 12:20:03,869 INFO ]: Interpolant automaton has 9 states. [2018-06-25 12:20:03,869 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 12:20:03,869 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 12:20:03,869 INFO ]: Found error trace [2018-06-25 12:20:03,869 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:20:03,870 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:20:03,870 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 3 times [2018-06-25 12:20:03,870 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:20:03,870 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:20:03,871 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:20:03,871 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 12:20:03,871 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:20:04,198 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:20:04,743 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-25 12:20:04,966 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 38 [2018-06-25 12:20:05,140 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 41 [2018-06-25 12:20:05,209 INFO ]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:20:05,209 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:20:05,209 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 [2018-06-25 12:20:05,219 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 12:20:05,385 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-25 12:20:05,385 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:20:05,397 INFO ]: Computing forward predicates... [2018-06-25 12:20:08,482 WARN ]: Spent 1.38 s on a formula simplification. DAG size of input: 232 DAG size of output: 72 [2018-06-25 12:20:31,188 WARN ]: Spent 15.08 s on a formula simplification. DAG size of input: 971 DAG size of output: 78 [2018-06-25 12:20:46,142 WARN ]: Spent 11.43 s on a formula simplification. DAG size of input: 864 DAG size of output: 77 [2018-06-25 12:20:47,064 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:20:47,086 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:20:47,086 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2018-06-25 12:20:47,086 INFO ]: Interpolant automaton has 12 states [2018-06-25 12:20:47,086 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-25 12:20:47,086 INFO ]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-06-25 12:20:47,087 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-06-25 12:20:47,126 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:20:47,127 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 12:20:47,127 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 12:20:47,127 INFO ]: Start accepts. Automaton has 12 states. Word has length 12 [2018-06-25 12:20:47,127 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:20:47,128 INFO ]: With dead ends: 9 [2018-06-25 12:20:47,128 INFO ]: Without dead ends: 0 [2018-06-25 12:20:47,128 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-06-25 12:20:47,128 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-25 12:20:47,128 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-25 12:20:47,128 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-25 12:20:47,128 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-25 12:20:47,128 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2018-06-25 12:20:47,128 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:20:47,128 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-25 12:20:47,128 INFO ]: Interpolant automaton has 12 states. [2018-06-25 12:20:47,128 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-25 12:20:47,128 INFO ]: Finished isEmpty. No accepting run. [2018-06-25 12:20:47,134 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 12:20:47 BoogieIcfgContainer [2018-06-25 12:20:47,134 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 12:20:47,135 INFO ]: Toolchain (without parser) took 50443.87 ms. Allocated memory was 305.7 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 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 32.2 MB. Max. memory is 3.6 GB. [2018-06-25 12:20:47,136 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 305.7 MB. Free memory is still 271.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 12:20:47,136 INFO ]: ChcToBoogie took 57.52 ms. Allocated memory is still 305.7 MB. Free memory was 247.2 MB in the beginning and 244.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-25 12:20:47,136 INFO ]: Boogie Preprocessor took 65.74 ms. Allocated memory is still 305.7 MB. Free memory was 244.2 MB in the beginning and 242.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 12:20:47,137 INFO ]: RCFGBuilder took 486.57 ms. Allocated memory is still 305.7 MB. Free memory was 242.3 MB in the beginning and 218.2 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 3.6 GB. [2018-06-25 12:20:47,137 INFO ]: TraceAbstraction took 49826.16 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 218.2 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. [2018-06-25 12:20:47,140 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 305.7 MB. Free memory is still 271.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 57.52 ms. Allocated memory is still 305.7 MB. Free memory was 247.2 MB in the beginning and 244.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 65.74 ms. Allocated memory is still 305.7 MB. Free memory was 244.2 MB in the beginning and 242.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 486.57 ms. Allocated memory is still 305.7 MB. Free memory was 242.3 MB in the beginning and 218.2 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 49826.16 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 218.2 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. SAFE Result, 49.7s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 24 SDtfs, 1 SDslu, 50 SDs, 0 SdLazy, 24 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 31.3s 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 47.9s InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 10776 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1146 ConjunctsInSsa, 185 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 4/44 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_12-20-47-150.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_12-20-47-150.csv Received shutdown request...