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/eldarica-misc/LIA/reve/024-horn.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 09:17:18,171 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 09:17:18,174 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 09:17:18,186 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 09:17:18,187 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 09:17:18,187 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 09:17:18,190 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 09:17:18,196 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 09:17:18,198 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 09:17:18,198 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 09:17:18,200 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 09:17:18,201 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 09:17:18,201 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 09:17:18,202 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 09:17:18,203 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 09:17:18,206 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 09:17:18,207 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 09:17:18,216 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 09:17:18,218 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 09:17:18,219 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 09:17:18,220 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 09:17:18,224 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 09:17:18,224 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 09:17:18,224 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 09:17:18,225 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 09:17:18,226 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 09:17:18,227 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 09:17:18,227 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 09:17:18,228 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 09:17:18,228 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 09:17:18,229 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 09:17:18,229 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 09:17:18,230 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 09:17:18,230 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 09:17:18,231 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 09:17:18,231 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 09:17:18,256 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 09:17:18,256 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 09:17:18,256 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 09:17:18,257 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 09:17:18,258 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 09:17:18,258 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 09:17:18,258 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 09:17:18,258 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 09:17:18,258 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 09:17:18,259 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 09:17:18,261 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 09:17:18,262 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 09:17:18,262 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 09:17:18,262 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 09:17:18,262 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 09:17:18,262 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 09:17:18,263 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 09:17:18,263 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 09:17:18,263 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 09:17:18,263 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 09:17:18,263 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 09:17:18,265 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 09:17:18,266 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 09:17:18,311 INFO ]: Repository-Root is: /tmp [2018-06-25 09:17:18,329 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 09:17:18,334 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 09:17:18,335 INFO ]: Initializing SmtParser... [2018-06-25 09:17:18,336 INFO ]: SmtParser initialized [2018-06-25 09:17:18,336 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/reve/024-horn.smt2 [2018-06-25 09:17:18,338 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 09:17:18,426 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/reve/024-horn.smt2 unknown [2018-06-25 09:17:18,604 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/reve/024-horn.smt2 [2018-06-25 09:17:18,609 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 09:17:18,615 INFO ]: Walking toolchain with 4 elements. [2018-06-25 09:17:18,615 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 09:17:18,615 INFO ]: Initializing ChcToBoogie... [2018-06-25 09:17:18,615 INFO ]: ChcToBoogie initialized [2018-06-25 09:17:18,619 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 09:17:18" (1/1) ... [2018-06-25 09:17:18,671 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:18 Unit [2018-06-25 09:17:18,671 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 09:17:18,672 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 09:17:18,672 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 09:17:18,672 INFO ]: Boogie Preprocessor initialized [2018-06-25 09:17:18,695 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:18" (1/1) ... [2018-06-25 09:17:18,695 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:18" (1/1) ... [2018-06-25 09:17:18,700 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:18" (1/1) ... [2018-06-25 09:17:18,700 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:18" (1/1) ... [2018-06-25 09:17:18,703 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:18" (1/1) ... [2018-06-25 09:17:18,706 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:18" (1/1) ... [2018-06-25 09:17:18,707 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:18" (1/1) ... [2018-06-25 09:17:18,709 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 09:17:18,709 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 09:17:18,709 INFO ]: Initializing RCFGBuilder... [2018-06-25 09:17:18,709 INFO ]: RCFGBuilder initialized [2018-06-25 09:17:18,710 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:18" (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 09:17:18,725 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 09:17:18,725 INFO ]: Found specification of procedure gotoProc [2018-06-25 09:17:18,725 INFO ]: Found implementation of procedure gotoProc [2018-06-25 09:17:18,725 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 09:17:18,725 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 09:17:18,725 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 09:17:18,991 INFO ]: Using library mode [2018-06-25 09:17:18,992 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 09:17:18 BoogieIcfgContainer [2018-06-25 09:17:18,992 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 09:17:18,993 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 09:17:18,993 INFO ]: Initializing TraceAbstraction... [2018-06-25 09:17:18,996 INFO ]: TraceAbstraction initialized [2018-06-25 09:17:18,996 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 09:17:18" (1/3) ... [2018-06-25 09:17:18,997 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39699f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 09:17:18, skipping insertion in model container [2018-06-25 09:17:18,997 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 09:17:18" (2/3) ... [2018-06-25 09:17:18,997 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39699f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 09:17:18, skipping insertion in model container [2018-06-25 09:17:18,997 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 09:17:18" (3/3) ... [2018-06-25 09:17:18,999 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 09:17:19,008 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 09:17:19,019 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 09:17:19,068 INFO ]: Using default assertion order modulation [2018-06-25 09:17:19,069 INFO ]: Interprodecural is true [2018-06-25 09:17:19,069 INFO ]: Hoare is false [2018-06-25 09:17:19,069 INFO ]: Compute interpolants for FPandBP [2018-06-25 09:17:19,069 INFO ]: Backedges is TWOTRACK [2018-06-25 09:17:19,069 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 09:17:19,069 INFO ]: Difference is false [2018-06-25 09:17:19,069 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 09:17:19,069 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 09:17:19,085 INFO ]: Start isEmpty. Operand 12 states. [2018-06-25 09:17:19,099 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 09:17:19,100 INFO ]: Found error trace [2018-06-25 09:17:19,100 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:19,101 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:19,107 INFO ]: Analyzing trace with hash 80507752, now seen corresponding path program 1 times [2018-06-25 09:17:19,109 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:19,109 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:19,155 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:19,156 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:17:19,156 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:19,201 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:19,452 WARN ]: Spent 157.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-06-25 09:17:19,454 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:19,456 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 09:17:19,456 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 09:17:19,457 INFO ]: Interpolant automaton has 3 states [2018-06-25 09:17:19,468 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 09:17:19,468 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 09:17:19,470 INFO ]: Start difference. First operand 12 states. Second operand 3 states. [2018-06-25 09:17:19,559 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:19,559 INFO ]: Finished difference Result 15 states and 23 transitions. [2018-06-25 09:17:19,560 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 09:17:19,561 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 09:17:19,562 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:19,570 INFO ]: With dead ends: 15 [2018-06-25 09:17:19,570 INFO ]: Without dead ends: 15 [2018-06-25 09:17:19,578 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 09:17:19,593 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 09:17:19,607 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-06-25 09:17:19,609 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 09:17:19,610 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 17 transitions. [2018-06-25 09:17:19,611 INFO ]: Start accepts. Automaton has 11 states and 17 transitions. Word has length 7 [2018-06-25 09:17:19,611 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:19,611 INFO ]: Abstraction has 11 states and 17 transitions. [2018-06-25 09:17:19,611 INFO ]: Interpolant automaton has 3 states. [2018-06-25 09:17:19,611 INFO ]: Start isEmpty. Operand 11 states and 17 transitions. [2018-06-25 09:17:19,611 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 09:17:19,611 INFO ]: Found error trace [2018-06-25 09:17:19,611 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:19,612 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:19,612 INFO ]: Analyzing trace with hash -1808795508, now seen corresponding path program 1 times [2018-06-25 09:17:19,612 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:19,612 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:19,613 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:19,613 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:17:19,613 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:19,632 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:19,795 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 11 [2018-06-25 09:17:19,813 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:19,813 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:19,813 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 09:17:19,819 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:17:19,846 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:19,852 INFO ]: Computing forward predicates... [2018-06-25 09:17:19,885 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:19,905 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:17:19,905 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 09:17:19,906 INFO ]: Interpolant automaton has 5 states [2018-06-25 09:17:19,906 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 09:17:19,906 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-25 09:17:19,906 INFO ]: Start difference. First operand 11 states and 17 transitions. Second operand 5 states. [2018-06-25 09:17:20,132 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:20,132 INFO ]: Finished difference Result 16 states and 24 transitions. [2018-06-25 09:17:20,133 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 09:17:20,133 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 09:17:20,133 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:20,134 INFO ]: With dead ends: 16 [2018-06-25 09:17:20,134 INFO ]: Without dead ends: 16 [2018-06-25 09:17:20,135 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-25 09:17:20,135 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-25 09:17:20,136 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-06-25 09:17:20,136 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 09:17:20,139 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2018-06-25 09:17:20,139 INFO ]: Start accepts. Automaton has 12 states and 18 transitions. Word has length 8 [2018-06-25 09:17:20,139 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:20,139 INFO ]: Abstraction has 12 states and 18 transitions. [2018-06-25 09:17:20,139 INFO ]: Interpolant automaton has 5 states. [2018-06-25 09:17:20,139 INFO ]: Start isEmpty. Operand 12 states and 18 transitions. [2018-06-25 09:17:20,140 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 09:17:20,140 INFO ]: Found error trace [2018-06-25 09:17:20,140 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:20,140 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:20,140 INFO ]: Analyzing trace with hash -247654424, now seen corresponding path program 2 times [2018-06-25 09:17:20,140 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:20,140 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:20,141 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:20,141 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:17:20,141 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:20,184 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:20,347 WARN ]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-25 09:17:20,507 WARN ]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-25 09:17:20,603 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:20,603 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:20,603 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 09:17:20,612 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 09:17:20,651 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 09:17:20,651 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:20,654 INFO ]: Computing forward predicates... [2018-06-25 09:17:20,881 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:20,900 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:17:20,900 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-06-25 09:17:20,900 INFO ]: Interpolant automaton has 7 states [2018-06-25 09:17:20,900 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 09:17:20,900 INFO ]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-25 09:17:20,901 INFO ]: Start difference. First operand 12 states and 18 transitions. Second operand 7 states. [2018-06-25 09:17:21,137 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:21,137 INFO ]: Finished difference Result 22 states and 34 transitions. [2018-06-25 09:17:21,138 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 09:17:21,138 INFO ]: Start accepts. Automaton has 7 states. Word has length 9 [2018-06-25 09:17:21,138 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:21,139 INFO ]: With dead ends: 22 [2018-06-25 09:17:21,139 INFO ]: Without dead ends: 22 [2018-06-25 09:17:21,139 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-06-25 09:17:21,139 INFO ]: Start minimizeSevpa. Operand 22 states. [2018-06-25 09:17:21,141 INFO ]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-06-25 09:17:21,141 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-25 09:17:21,142 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 22 transitions. [2018-06-25 09:17:21,142 INFO ]: Start accepts. Automaton has 14 states and 22 transitions. Word has length 9 [2018-06-25 09:17:21,142 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:21,142 INFO ]: Abstraction has 14 states and 22 transitions. [2018-06-25 09:17:21,142 INFO ]: Interpolant automaton has 7 states. [2018-06-25 09:17:21,142 INFO ]: Start isEmpty. Operand 14 states and 22 transitions. [2018-06-25 09:17:21,143 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 09:17:21,143 INFO ]: Found error trace [2018-06-25 09:17:21,143 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:21,143 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:21,143 INFO ]: Analyzing trace with hash 906862381, now seen corresponding path program 1 times [2018-06-25 09:17:21,143 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:21,143 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:21,144 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:21,144 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 09:17:21,144 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:21,156 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:21,206 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-25 09:17:21,206 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:21,206 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 09:17:21,212 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:17:21,240 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:21,242 INFO ]: Computing forward predicates... [2018-06-25 09:17:21,250 INFO ]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-25 09:17:21,284 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-25 09:17:21,284 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2018-06-25 09:17:21,284 INFO ]: Interpolant automaton has 4 states [2018-06-25 09:17:21,284 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-25 09:17:21,284 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 09:17:21,284 INFO ]: Start difference. First operand 14 states and 22 transitions. Second operand 4 states. [2018-06-25 09:17:21,325 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:21,325 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 09:17:21,325 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 09:17:21,325 INFO ]: Start accepts. Automaton has 4 states. Word has length 10 [2018-06-25 09:17:21,325 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:21,326 INFO ]: With dead ends: 12 [2018-06-25 09:17:21,326 INFO ]: Without dead ends: 12 [2018-06-25 09:17:21,326 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 09:17:21,326 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 09:17:21,327 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 09:17:21,327 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 09:17:21,328 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 09:17:21,328 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 09:17:21,328 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:21,328 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 09:17:21,328 INFO ]: Interpolant automaton has 4 states. [2018-06-25 09:17:21,328 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 09:17:21,328 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 09:17:21,328 INFO ]: Found error trace [2018-06-25 09:17:21,328 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:21,328 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:21,329 INFO ]: Analyzing trace with hash -2078892952, now seen corresponding path program 3 times [2018-06-25 09:17:21,329 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:21,329 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:21,330 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:21,330 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 09:17:21,330 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:21,377 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:21,677 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:21,677 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:21,677 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-25 09:17:21,693 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 09:17:21,759 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 09:17:21,759 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:21,762 INFO ]: Computing forward predicates... [2018-06-25 09:17:22,041 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:22,061 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:17:22,061 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-06-25 09:17:22,062 INFO ]: Interpolant automaton has 11 states [2018-06-25 09:17:22,062 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-25 09:17:22,062 INFO ]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-25 09:17:22,062 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-06-25 09:17:23,196 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:23,196 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 09:17:23,197 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 09:17:23,197 INFO ]: Start accepts. Automaton has 11 states. Word has length 11 [2018-06-25 09:17:23,197 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:23,197 INFO ]: With dead ends: 15 [2018-06-25 09:17:23,197 INFO ]: Without dead ends: 15 [2018-06-25 09:17:23,198 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-06-25 09:17:23,198 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 09:17:23,200 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 09:17:23,200 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 09:17:23,201 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 09:17:23,201 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-06-25 09:17:23,201 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:23,201 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 09:17:23,201 INFO ]: Interpolant automaton has 11 states. [2018-06-25 09:17:23,201 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 09:17:23,201 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 09:17:23,201 INFO ]: Found error trace [2018-06-25 09:17:23,201 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:23,201 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:23,201 INFO ]: Analyzing trace with hash 216865548, now seen corresponding path program 4 times [2018-06-25 09:17:23,202 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:23,202 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:23,202 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:23,202 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 09:17:23,202 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:23,231 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:23,475 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:23,475 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:23,475 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 09:17:23,484 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 09:17:23,511 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 09:17:23,511 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:23,516 INFO ]: Computing forward predicates... [2018-06-25 09:17:23,772 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:23,803 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:17:23,803 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-25 09:17:23,803 INFO ]: Interpolant automaton has 17 states [2018-06-25 09:17:23,803 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-25 09:17:23,803 INFO ]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-06-25 09:17:23,803 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 17 states. [2018-06-25 09:17:24,277 WARN ]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-06-25 09:17:24,309 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:24,309 INFO ]: Finished difference Result 22 states and 22 transitions. [2018-06-25 09:17:24,309 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-25 09:17:24,309 INFO ]: Start accepts. Automaton has 17 states. Word has length 14 [2018-06-25 09:17:24,310 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:24,310 INFO ]: With dead ends: 22 [2018-06-25 09:17:24,310 INFO ]: Without dead ends: 22 [2018-06-25 09:17:24,311 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2018-06-25 09:17:24,311 INFO ]: Start minimizeSevpa. Operand 22 states. [2018-06-25 09:17:24,313 INFO ]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-06-25 09:17:24,313 INFO ]: Start removeUnreachable. Operand 22 states. [2018-06-25 09:17:24,314 INFO ]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-06-25 09:17:24,314 INFO ]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 14 [2018-06-25 09:17:24,314 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:24,314 INFO ]: Abstraction has 22 states and 22 transitions. [2018-06-25 09:17:24,314 INFO ]: Interpolant automaton has 17 states. [2018-06-25 09:17:24,314 INFO ]: Start isEmpty. Operand 22 states and 22 transitions. [2018-06-25 09:17:24,315 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-25 09:17:24,315 INFO ]: Found error trace [2018-06-25 09:17:24,315 INFO ]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:24,315 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:24,315 INFO ]: Analyzing trace with hash 290673384, now seen corresponding path program 5 times [2018-06-25 09:17:24,315 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:24,315 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:24,316 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:24,316 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 09:17:24,316 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:24,364 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:24,616 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-25 09:17:24,938 INFO ]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:24,938 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:24,938 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 09:17:24,951 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 09:17:25,082 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-06-25 09:17:25,082 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:25,099 INFO ]: Computing forward predicates... [2018-06-25 09:17:26,177 INFO ]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:26,196 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:17:26,196 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-06-25 09:17:26,196 INFO ]: Interpolant automaton has 32 states [2018-06-25 09:17:26,197 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-25 09:17:26,197 INFO ]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2018-06-25 09:17:26,197 INFO ]: Start difference. First operand 22 states and 22 transitions. Second operand 32 states. [2018-06-25 09:17:27,648 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:27,648 INFO ]: Finished difference Result 23 states and 23 transitions. [2018-06-25 09:17:27,650 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-25 09:17:27,650 INFO ]: Start accepts. Automaton has 32 states. Word has length 21 [2018-06-25 09:17:27,650 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:27,651 INFO ]: With dead ends: 23 [2018-06-25 09:17:27,651 INFO ]: Without dead ends: 23 [2018-06-25 09:17:27,652 INFO ]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2018-06-25 09:17:27,652 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-25 09:17:27,653 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-25 09:17:27,654 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-25 09:17:27,654 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-06-25 09:17:27,654 INFO ]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-06-25 09:17:27,654 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:27,654 INFO ]: Abstraction has 23 states and 23 transitions. [2018-06-25 09:17:27,654 INFO ]: Interpolant automaton has 32 states. [2018-06-25 09:17:27,654 INFO ]: Start isEmpty. Operand 23 states and 23 transitions. [2018-06-25 09:17:27,656 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-25 09:17:27,657 INFO ]: Found error trace [2018-06-25 09:17:27,657 INFO ]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 09:17:27,657 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 09:17:27,657 INFO ]: Analyzing trace with hash 411371788, now seen corresponding path program 6 times [2018-06-25 09:17:27,657 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 09:17:27,657 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 09:17:27,658 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:27,658 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 09:17:27,658 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 09:17:27,722 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:28,027 INFO ]: Checked inductivity of 120 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-06-25 09:17:28,027 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 09:17:28,027 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 09:17:28,034 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-25 09:17:28,106 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-06-25 09:17:28,106 INFO ]: Conjunction of SSA is unsat [2018-06-25 09:17:28,113 INFO ]: Computing forward predicates... [2018-06-25 09:17:28,763 INFO ]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 09:17:28,795 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 09:17:28,795 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18] total 21 [2018-06-25 09:17:28,795 INFO ]: Interpolant automaton has 21 states [2018-06-25 09:17:28,796 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-25 09:17:28,796 INFO ]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2018-06-25 09:17:28,796 INFO ]: Start difference. First operand 23 states and 23 transitions. Second operand 21 states. [2018-06-25 09:17:29,526 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 09:17:29,526 INFO ]: Finished difference Result 20 states and 20 transitions. [2018-06-25 09:17:29,528 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-25 09:17:29,528 INFO ]: Start accepts. Automaton has 21 states. Word has length 22 [2018-06-25 09:17:29,528 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 09:17:29,528 INFO ]: With dead ends: 20 [2018-06-25 09:17:29,528 INFO ]: Without dead ends: 0 [2018-06-25 09:17:29,528 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=497, Unknown=1, NotChecked=0, Total=600 [2018-06-25 09:17:29,528 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-25 09:17:29,528 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-25 09:17:29,528 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-25 09:17:29,528 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-25 09:17:29,529 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-06-25 09:17:29,529 INFO ]: Finished accepts. word is rejected. [2018-06-25 09:17:29,529 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-25 09:17:29,529 INFO ]: Interpolant automaton has 21 states. [2018-06-25 09:17:29,529 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-25 09:17:29,529 INFO ]: Finished isEmpty. No accepting run. [2018-06-25 09:17:29,533 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 09:17:29 BoogieIcfgContainer [2018-06-25 09:17:29,533 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 09:17:29,533 INFO ]: Toolchain (without parser) took 10924.53 ms. Allocated memory was 305.7 MB in the beginning and 409.5 MB in the end (delta: 103.8 MB). Free memory was 262.0 MB in the beginning and 368.7 MB in the end (delta: -106.6 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 09:17:29,534 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 305.7 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 09:17:29,535 INFO ]: ChcToBoogie took 56.51 ms. Allocated memory is still 305.7 MB. Free memory was 261.0 MB in the beginning and 259.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:17:29,535 INFO ]: Boogie Preprocessor took 37.01 ms. Allocated memory is still 305.7 MB. Free memory was 259.0 MB in the beginning and 258.0 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. [2018-06-25 09:17:29,535 INFO ]: RCFGBuilder took 282.19 ms. Allocated memory is still 305.7 MB. Free memory was 258.0 MB in the beginning and 249.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-25 09:17:29,536 INFO ]: TraceAbstraction took 10540.27 ms. Allocated memory was 305.7 MB in the beginning and 409.5 MB in the end (delta: 103.8 MB). Free memory was 249.0 MB in the beginning and 368.7 MB in the end (delta: -119.6 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 09:17:29,538 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 305.7 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 56.51 ms. Allocated memory is still 305.7 MB. Free memory was 261.0 MB in the beginning and 259.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 37.01 ms. Allocated memory is still 305.7 MB. Free memory was 259.0 MB in the beginning and 258.0 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. * RCFGBuilder took 282.19 ms. Allocated memory is still 305.7 MB. Free memory was 258.0 MB in the beginning and 249.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 10540.27 ms. Allocated memory was 305.7 MB in the beginning and 409.5 MB in the end (delta: 103.8 MB). Free memory was 249.0 MB in the beginning and 368.7 MB in the end (delta: -119.6 MB). There was no memory consumed. 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, 12 locations, 1 error locations. SAFE Result, 10.4s OverallTime, 8 OverallIterations, 15 TraceHistogramMax, 4.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 67 SDtfs, 44 SDslu, 340 SDs, 0 SdLazy, 822 SolverSat, 46 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 186 GetRequests, 56 SyntacticMatches, 17 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=7, 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, 8 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 197 NumberOfCodeBlocks, 197 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 182 ConstructedInterpolants, 9 QuantifiedInterpolants, 28524 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1203 ConjunctsInSsa, 855 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 82/540 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/024-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_09-17-29-550.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/024-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_09-17-29-550.csv Received shutdown request...