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-7.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 04:46:09,493 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:46:09,495 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:46:09,509 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:46:09,510 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:46:09,511 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:46:09,512 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:46:09,514 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:46:09,515 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:46:09,516 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:46:09,517 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:46:09,517 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:46:09,518 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:46:09,519 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:46:09,520 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:46:09,520 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:46:09,522 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:46:09,524 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:46:09,525 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:46:09,526 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:46:09,527 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:46:09,530 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:46:09,530 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:46:09,530 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:46:09,531 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:46:09,532 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:46:09,532 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:46:09,533 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:46:09,534 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:46:09,534 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:46:09,535 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:46:09,536 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:46:09,536 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:46:09,537 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:46:09,537 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:46:09,538 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:46:09,557 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:46:09,557 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:46:09,558 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:46:09,558 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:46:09,560 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:46:09,560 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:46:09,560 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:46:09,560 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:46:09,560 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:46:09,561 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:46:09,561 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:46:09,561 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:46:09,561 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:46:09,561 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:46:09,562 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:46:09,562 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:46:09,562 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:46:09,564 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:46:09,564 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:46:09,604 INFO ]: Repository-Root is: /tmp [2018-06-22 04:46:09,621 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:46:09,625 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:46:09,626 INFO ]: Initializing SmtParser... [2018-06-22 04:46:09,626 INFO ]: SmtParser initialized [2018-06-22 04:46:09,626 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-7.smt2 [2018-06-22 04:46:09,627 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 04:46:09,724 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-7.smt2 unknown [2018-06-22 04:46:10,679 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/simple_array_inversion-7.smt2 [2018-06-22 04:46:10,686 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:46:10,696 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:46:10,696 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:46:10,696 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:46:10,696 INFO ]: ChcToBoogie initialized [2018-06-22 04:46:10,700 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:46:10" (1/1) ... [2018-06-22 04:46:10,782 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:46:10 Unit [2018-06-22 04:46:10,782 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:46:10,782 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:46:10,782 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:46:10,782 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:46:10,802 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:46:10" (1/1) ... [2018-06-22 04:46:10,802 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:46:10" (1/1) ... [2018-06-22 04:46:10,820 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:46:10" (1/1) ... [2018-06-22 04:46:10,820 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:46:10" (1/1) ... [2018-06-22 04:46:10,847 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:46:10" (1/1) ... [2018-06-22 04:46:10,849 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:46:10" (1/1) ... [2018-06-22 04:46:10,856 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:46:10" (1/1) ... [2018-06-22 04:46:10,863 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:46:10,864 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:46:10,864 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:46:10,864 INFO ]: RCFGBuilder initialized [2018-06-22 04:46:10,865 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:46:10" (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 04:46:10,887 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:46:10,887 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:46:10,887 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:46:10,887 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:46:10,887 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:46:10,887 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 04:46:11,581 INFO ]: Using library mode [2018-06-22 04:46:11,582 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:46:11 BoogieIcfgContainer [2018-06-22 04:46:11,582 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:46:11,584 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:46:11,584 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:46:11,587 INFO ]: TraceAbstraction initialized [2018-06-22 04:46:11,587 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:46:10" (1/3) ... [2018-06-22 04:46:11,588 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39585c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:46:11, skipping insertion in model container [2018-06-22 04:46:11,588 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:46:10" (2/3) ... [2018-06-22 04:46:11,593 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39585c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:46:11, skipping insertion in model container [2018-06-22 04:46:11,593 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:46:11" (3/3) ... [2018-06-22 04:46:11,595 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:46:11,604 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:46:11,613 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:46:11,659 INFO ]: Using default assertion order modulation [2018-06-22 04:46:11,660 INFO ]: Interprodecural is true [2018-06-22 04:46:11,660 INFO ]: Hoare is false [2018-06-22 04:46:11,660 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:46:11,660 INFO ]: Backedges is TWOTRACK [2018-06-22 04:46:11,660 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:46:11,660 INFO ]: Difference is false [2018-06-22 04:46:11,660 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:46:11,660 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:46:11,679 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:46:11,691 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:46:11,692 INFO ]: Found error trace [2018-06-22 04:46:11,692 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:46:11,693 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:46:11,698 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 04:46:11,700 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:46:11,700 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:46:11,746 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:46:11,746 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:46:11,746 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:46:11,845 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:46:11,993 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:46:11,996 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:46:11,996 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:46:11,998 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:46:12,013 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:46:12,013 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:46:12,016 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:46:12,150 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:46:12,151 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:46:12,152 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:46:12,153 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:46:12,153 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:46:12,165 INFO ]: With dead ends: 9 [2018-06-22 04:46:12,165 INFO ]: Without dead ends: 9 [2018-06-22 04:46:12,167 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 04:46:12,186 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:46:12,215 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:46:12,216 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:46:12,217 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:46:12,221 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:46:12,221 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:46:12,221 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:46:12,221 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:46:12,221 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:46:12,221 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:46:12,221 INFO ]: Found error trace [2018-06-22 04:46:12,221 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:46:12,221 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:46:12,222 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 04:46:12,222 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:46:12,222 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:46:12,222 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:46:12,222 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:46:12,222 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:46:12,447 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:46:12,935 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 04:46:12,936 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:46:12,936 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:46:12,936 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) [2018-06-22 04:46:12,951 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:46:13,184 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:46:13,200 INFO ]: Computing forward predicates... [2018-06-22 04:46:13,446 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 04:46:15,046 WARN ]: Spent 614.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 15 [2018-06-22 04:46:15,052 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:46:15,074 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:46:15,074 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 04:46:15,075 INFO ]: Interpolant automaton has 6 states [2018-06-22 04:46:15,075 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 04:46:15,075 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:46:15,075 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 04:46:15,474 WARN ]: Spent 354.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 8 [2018-06-22 04:46:15,536 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:46:15,536 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 04:46:15,537 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 04:46:15,537 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 04:46:15,537 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:46:15,537 INFO ]: With dead ends: 11 [2018-06-22 04:46:15,537 INFO ]: Without dead ends: 11 [2018-06-22 04:46:15,538 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-06-22 04:46:15,538 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 04:46:15,539 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 04:46:15,539 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 04:46:15,539 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 04:46:15,539 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 04:46:15,539 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:46:15,540 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 04:46:15,540 INFO ]: Interpolant automaton has 6 states. [2018-06-22 04:46:15,540 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 04:46:15,540 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 04:46:15,540 INFO ]: Found error trace [2018-06-22 04:46:15,540 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:46:15,540 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:46:15,540 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-22 04:46:15,540 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:46:15,540 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:46:15,541 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:46:15,541 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:46:15,541 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:46:15,938 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:46:16,861 WARN ]: Spent 275.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 7 [2018-06-22 04:46:17,085 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:46:17,085 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:46:17,085 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 04:46:17,100 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 04:46:17,418 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:46:17,418 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:46:17,438 INFO ]: Computing forward predicates... [2018-06-22 04:46:18,974 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 15 [2018-06-22 04:46:40,841 WARN ]: Spent 1.41 s on a formula simplification. DAG size of input: 291 DAG size of output: 38 [2018-06-22 04:46:42,563 WARN ]: Spent 150.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2018-06-22 04:46:42,589 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:46:42,611 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:46:42,611 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 04:46:42,612 INFO ]: Interpolant automaton has 10 states [2018-06-22 04:46:42,612 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 04:46:42,612 INFO ]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-06-22 04:46:42,612 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 04:46:42,873 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:46:42,873 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 04:46:42,874 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 04:46:42,874 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 04:46:42,874 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:46:42,874 INFO ]: With dead ends: 13 [2018-06-22 04:46:42,874 INFO ]: Without dead ends: 13 [2018-06-22 04:46:42,874 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2018-06-22 04:46:42,875 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 04:46:42,876 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 04:46:42,876 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 04:46:42,876 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 04:46:42,876 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 04:46:42,876 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:46:42,876 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 04:46:42,876 INFO ]: Interpolant automaton has 10 states. [2018-06-22 04:46:42,876 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 04:46:42,877 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 04:46:42,877 INFO ]: Found error trace [2018-06-22 04:46:42,877 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:46:42,877 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:46:42,877 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 3 times [2018-06-22 04:46:42,877 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:46:42,877 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:46:42,878 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:46:42,878 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:46:42,878 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:46:43,463 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:46:44,454 WARN ]: Spent 193.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 5 [2018-06-22 04:46:44,752 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:46:44,752 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:46:44,753 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 04:46:44,815 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 04:46:45,199 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 04:46:45,200 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:46:45,221 INFO ]: Computing forward predicates... [2018-06-22 04:46:45,853 WARN ]: Spent 393.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 15 [2018-06-22 04:47:00,304 WARN ]: Spent 1.30 s on a formula simplification. DAG size of input: 291 DAG size of output: 38 Received shutdown request... [2018-06-22 04:47:09,124 INFO ]: Timeout while computing interpolants [2018-06-22 04:47:09,325 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:47:09,325 WARN ]: Verification canceled [2018-06-22 04:47:09,329 WARN ]: Timeout [2018-06-22 04:47:09,329 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 04:47:09 BoogieIcfgContainer [2018-06-22 04:47:09,330 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 04:47:09,330 INFO ]: Toolchain (without parser) took 58643.69 ms. Allocated memory was 301.5 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 195.0 MB in the beginning and 666.0 MB in the end (delta: -471.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 04:47:09,331 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 301.5 MB. Free memory is still 267.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 04:47:09,331 INFO ]: ChcToBoogie took 85.82 ms. Allocated memory is still 301.5 MB. Free memory was 194.0 MB in the beginning and 191.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 04:47:09,334 INFO ]: Boogie Preprocessor took 80.51 ms. Allocated memory is still 301.5 MB. Free memory was 191.0 MB in the beginning and 188.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 04:47:09,334 INFO ]: RCFGBuilder took 718.60 ms. Allocated memory was 301.5 MB in the beginning and 319.8 MB in the end (delta: 18.4 MB). Free memory was 188.0 MB in the beginning and 214.7 MB in the end (delta: -26.7 MB). Peak memory consumption was 11.6 MB. Max. memory is 3.6 GB. [2018-06-22 04:47:09,334 INFO ]: TraceAbstraction took 57745.89 ms. Allocated memory was 319.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 214.7 MB in the beginning and 666.0 MB in the end (delta: -451.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 04:47:09,344 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 301.5 MB. Free memory is still 267.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 85.82 ms. Allocated memory is still 301.5 MB. Free memory was 194.0 MB in the beginning and 191.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 80.51 ms. Allocated memory is still 301.5 MB. Free memory was 191.0 MB in the beginning and 188.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 718.60 ms. Allocated memory was 301.5 MB in the beginning and 319.8 MB in the end (delta: 18.4 MB). Free memory was 188.0 MB in the beginning and 214.7 MB in the end (delta: -26.7 MB). Peak memory consumption was 11.6 MB. Max. memory is 3.6 GB. * TraceAbstraction took 57745.89 ms. Allocated memory was 319.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 214.7 MB in the beginning and 666.0 MB in the end (delta: -451.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 13 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 200 quantified variables from 13 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 57.6s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 1 SDslu, 48 SDs, 0 SdLazy, 22 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.1s 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, 1.0s SatisfiabilityAnalysisTime, 28.8s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1838 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1270 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-7.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_04-47-09-362.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/simple_array_inversion-7.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_04-47-09-362.csv Completed graceful shutdown