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/ctigar/hsort.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:04:48,685 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:04:48,687 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:04:48,703 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:04:48,703 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:04:48,704 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:04:48,705 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:04:48,707 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:04:48,708 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:04:48,709 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:04:48,710 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:04:48,710 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:04:48,712 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:04:48,713 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:04:48,714 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:04:48,714 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:04:48,719 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:04:48,721 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:04:48,730 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:04:48,732 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:04:48,733 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:04:48,735 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:04:48,735 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:04:48,735 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:04:48,736 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:04:48,737 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:04:48,745 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:04:48,746 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:04:48,747 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:04:48,747 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:04:48,748 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:04:48,748 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:04:48,748 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:04:48,749 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:04:48,750 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:04:48,750 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:04:48,773 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:04:48,773 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:04:48,774 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:04:48,774 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:04:48,775 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:04:48,775 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:04:48,775 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:04:48,776 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:04:48,776 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:04:48,776 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:04:48,776 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:04:48,776 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:04:48,777 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:04:48,777 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:04:48,777 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:04:48,777 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:04:48,777 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:04:48,777 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:04:48,778 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:04:48,778 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:04:48,778 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:04:48,779 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:04:48,780 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:04:48,825 INFO ]: Repository-Root is: /tmp [2018-06-25 13:04:48,845 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:04:48,852 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:04:48,854 INFO ]: Initializing SmtParser... [2018-06-25 13:04:48,854 INFO ]: SmtParser initialized [2018-06-25 13:04:48,854 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/hsort.c.smt2 [2018-06-25 13:04:48,856 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 13:04:48,945 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/hsort.c.smt2 unknown [2018-06-25 13:04:49,378 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/hsort.c.smt2 [2018-06-25 13:04:49,383 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:04:49,389 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:04:49,390 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:04:49,390 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:04:49,390 INFO ]: ChcToBoogie initialized [2018-06-25 13:04:49,394 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:04:49" (1/1) ... [2018-06-25 13:04:49,459 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:49 Unit [2018-06-25 13:04:49,459 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:04:49,463 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:04:49,463 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:04:49,463 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:04:49,483 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:49" (1/1) ... [2018-06-25 13:04:49,483 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:49" (1/1) ... [2018-06-25 13:04:49,493 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:49" (1/1) ... [2018-06-25 13:04:49,493 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:49" (1/1) ... [2018-06-25 13:04:49,505 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:49" (1/1) ... [2018-06-25 13:04:49,507 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:49" (1/1) ... [2018-06-25 13:04:49,509 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:49" (1/1) ... [2018-06-25 13:04:49,512 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:04:49,513 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:04:49,513 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:04:49,513 INFO ]: RCFGBuilder initialized [2018-06-25 13:04:49,514 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:49" (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 13:04:49,529 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:04:49,529 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:04:49,529 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:04:49,530 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:04:49,530 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:04:49,530 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 13:04:49,887 INFO ]: Using library mode [2018-06-25 13:04:49,888 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:04:49 BoogieIcfgContainer [2018-06-25 13:04:49,888 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:04:49,890 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:04:49,890 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:04:49,893 INFO ]: TraceAbstraction initialized [2018-06-25 13:04:49,893 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:04:49" (1/3) ... [2018-06-25 13:04:49,894 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6e1e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:04:49, skipping insertion in model container [2018-06-25 13:04:49,894 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:04:49" (2/3) ... [2018-06-25 13:04:49,894 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6e1e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:04:49, skipping insertion in model container [2018-06-25 13:04:49,894 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:04:49" (3/3) ... [2018-06-25 13:04:49,896 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:04:49,905 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:04:49,913 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:04:49,958 INFO ]: Using default assertion order modulation [2018-06-25 13:04:49,958 INFO ]: Interprodecural is true [2018-06-25 13:04:49,958 INFO ]: Hoare is false [2018-06-25 13:04:49,958 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:04:49,958 INFO ]: Backedges is TWOTRACK [2018-06-25 13:04:49,958 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:04:49,958 INFO ]: Difference is false [2018-06-25 13:04:49,958 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:04:49,958 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:04:49,972 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:04:49,985 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:04:49,985 INFO ]: Found error trace [2018-06-25 13:04:49,986 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:04:49,986 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:04:49,994 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:04:49,995 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:04:49,996 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:04:50,037 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:04:50,037 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:04:50,038 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:04:50,093 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:04:50,194 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:04:50,196 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:04:50,196 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:04:50,197 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:04:50,207 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:04:50,208 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:04:50,209 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:04:50,278 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:04:50,278 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:04:50,278 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:04:50,280 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:04:50,280 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:04:50,287 INFO ]: With dead ends: 9 [2018-06-25 13:04:50,287 INFO ]: Without dead ends: 9 [2018-06-25 13:04:50,288 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 13:04:50,300 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:04:50,315 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:04:50,316 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:04:50,316 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:04:50,317 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:04:50,317 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:04:50,317 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:04:50,318 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:04:50,318 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:04:50,318 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:04:50,318 INFO ]: Found error trace [2018-06-25 13:04:50,318 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:04:50,318 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:04:50,318 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:04:50,318 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:04:50,318 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:04:50,319 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:04:50,319 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:04:50,319 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:04:50,403 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:04:50,647 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:04:50,648 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:04:50,648 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 13:04:50,655 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:04:50,725 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:04:50,736 INFO ]: Computing forward predicates... [2018-06-25 13:04:51,362 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:04:51,383 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:04:51,383 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:04:51,384 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:04:51,384 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:04:51,384 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:04:51,384 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:04:51,551 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:04:51,552 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:04:51,552 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:04:51,552 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:04:51,552 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:04:51,553 INFO ]: With dead ends: 10 [2018-06-25 13:04:51,553 INFO ]: Without dead ends: 10 [2018-06-25 13:04:51,554 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:04:51,554 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:04:51,555 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:04:51,555 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:04:51,555 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:04:51,555 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:04:51,555 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:04:51,555 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:04:51,555 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:04:51,555 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:04:51,556 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:04:51,556 INFO ]: Found error trace [2018-06-25 13:04:51,556 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:04:51,556 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:04:51,556 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 13:04:51,556 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:04:51,556 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:04:51,557 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:04:51,557 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:04:51,557 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:04:51,648 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:04:51,958 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-06-25 13:04:52,119 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:04:52,120 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:04:52,120 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 13:04:52,134 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:04:52,213 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:04:52,213 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:04:52,217 INFO ]: Computing forward predicates... [2018-06-25 13:04:54,112 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:04:54,134 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:04:54,134 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 13:04:54,134 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:04:54,135 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:04:54,135 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:04:54,135 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 13:04:54,269 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:04:54,269 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:04:54,269 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:04:54,269 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 13:04:54,269 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:04:54,269 INFO ]: With dead ends: 11 [2018-06-25 13:04:54,270 INFO ]: Without dead ends: 11 [2018-06-25 13:04:54,270 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-06-25 13:04:54,270 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:04:54,271 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:04:54,271 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:04:54,271 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:04:54,271 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:04:54,271 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:04:54,271 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:04:54,271 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:04:54,273 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:04:54,273 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:04:54,273 INFO ]: Found error trace [2018-06-25 13:04:54,273 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:04:54,273 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:04:54,273 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-25 13:04:54,273 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:04:54,273 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:04:54,274 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:04:54,274 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:04:54,274 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:04:54,339 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:04:54,599 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:04:54,599 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:04:54,599 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 13:04:54,605 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:04:54,727 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:04:54,727 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:04:54,732 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-25 13:05:57,649 INFO ]: Timeout while computing interpolants [2018-06-25 13:05:57,851 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:05:57,851 WARN ]: Verification canceled [2018-06-25 13:05:57,855 WARN ]: Timeout [2018-06-25 13:05:57,855 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:05:57 BoogieIcfgContainer [2018-06-25 13:05:57,855 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:05:57,856 INFO ]: Toolchain (without parser) took 68472.81 ms. Allocated memory was 306.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 249.1 MB in the beginning and 1.1 GB in the end (delta: -895.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:05:57,857 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:05:57,857 INFO ]: ChcToBoogie took 69.55 ms. Allocated memory is still 306.7 MB. Free memory was 249.1 MB in the beginning and 246.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:05:57,858 INFO ]: Boogie Preprocessor took 48.97 ms. Allocated memory is still 306.7 MB. Free memory was 246.2 MB in the beginning and 245.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-25 13:05:57,858 INFO ]: RCFGBuilder took 375.41 ms. Allocated memory is still 306.7 MB. Free memory was 245.2 MB in the beginning and 227.2 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:05:57,859 INFO ]: TraceAbstraction took 67965.64 ms. Allocated memory was 306.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 227.2 MB in the beginning and 1.1 GB in the end (delta: -917.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:05:57,862 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 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 69.55 ms. Allocated memory is still 306.7 MB. Free memory was 249.1 MB in the beginning and 246.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 48.97 ms. Allocated memory is still 306.7 MB. Free memory was 246.2 MB in the beginning and 245.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 375.41 ms. Allocated memory is still 306.7 MB. Free memory was 245.2 MB in the beginning and 227.2 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 67965.64 ms. Allocated memory was 306.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 227.2 MB in the beginning and 1.1 GB in the end (delta: -917.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 11 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 21 quantified variables from 26 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 67.9s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 3 SDslu, 32 SDs, 0 SdLazy, 15 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 657 SizeOfPredicates, 12 NumberOfNonLiveVariables, 400 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 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/hsort.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-05-57-874.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/hsort.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-05-57-874.csv Completed graceful shutdown