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/pldi08.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:25:33,191 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:25:33,193 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:25:33,208 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:25:33,208 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:25:33,209 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:25:33,210 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:25:33,214 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:25:33,215 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:25:33,217 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:25:33,218 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:25:33,218 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:25:33,219 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:25:33,220 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:25:33,229 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:25:33,230 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:25:33,232 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:25:33,233 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:25:33,235 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:25:33,235 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:25:33,237 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:25:33,243 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:25:33,243 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:25:33,243 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:25:33,244 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:25:33,245 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:25:33,246 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:25:33,249 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:25:33,250 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:25:33,250 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:25:33,255 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:25:33,256 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:25:33,256 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:25:33,256 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:25:33,257 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:25:33,257 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:25:33,281 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:25:33,281 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:25:33,282 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:25:33,282 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:25:33,283 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:25:33,284 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:25:33,285 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:25:33,285 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:25:33,285 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:25:33,286 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:25:33,286 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:25:33,286 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:25:33,286 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:25:33,286 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:25:33,286 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:25:33,287 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:25:33,287 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:25:33,287 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:25:33,287 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:25:33,287 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:25:33,287 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:25:33,292 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:25:33,293 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:25:33,353 INFO ]: Repository-Root is: /tmp [2018-06-25 13:25:33,369 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:25:33,374 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:25:33,376 INFO ]: Initializing SmtParser... [2018-06-25 13:25:33,376 INFO ]: SmtParser initialized [2018-06-25 13:25:33,377 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/pldi08.c.smt2 [2018-06-25 13:25:33,378 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 13:25:33,465 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/pldi08.c.smt2 unknown [2018-06-25 13:25:33,647 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/pldi08.c.smt2 [2018-06-25 13:25:33,652 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:25:33,659 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:25:33,660 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:25:33,660 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:25:33,660 INFO ]: ChcToBoogie initialized [2018-06-25 13:25:33,663 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:25:33" (1/1) ... [2018-06-25 13:25:33,718 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:25:33 Unit [2018-06-25 13:25:33,718 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:25:33,719 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:25:33,719 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:25:33,719 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:25:33,740 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:25:33" (1/1) ... [2018-06-25 13:25:33,740 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:25:33" (1/1) ... [2018-06-25 13:25:33,744 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:25:33" (1/1) ... [2018-06-25 13:25:33,745 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:25:33" (1/1) ... [2018-06-25 13:25:33,747 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:25:33" (1/1) ... [2018-06-25 13:25:33,748 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:25:33" (1/1) ... [2018-06-25 13:25:33,749 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:25:33" (1/1) ... [2018-06-25 13:25:33,758 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:25:33,759 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:25:33,759 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:25:33,759 INFO ]: RCFGBuilder initialized [2018-06-25 13:25:33,760 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:25:33" (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 13:25:33,773 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:25:33,773 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:25:33,773 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:25:33,774 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:25:33,774 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:25:33,774 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 13:25:33,958 INFO ]: Using library mode [2018-06-25 13:25:33,959 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:25:33 BoogieIcfgContainer [2018-06-25 13:25:33,959 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:25:33,960 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:25:33,960 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:25:33,963 INFO ]: TraceAbstraction initialized [2018-06-25 13:25:33,963 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:25:33" (1/3) ... [2018-06-25 13:25:33,964 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ec643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:25:33, skipping insertion in model container [2018-06-25 13:25:33,964 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:25:33" (2/3) ... [2018-06-25 13:25:33,964 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ec643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:25:33, skipping insertion in model container [2018-06-25 13:25:33,964 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:25:33" (3/3) ... [2018-06-25 13:25:33,967 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:25:33,976 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:25:33,984 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:25:34,037 INFO ]: Using default assertion order modulation [2018-06-25 13:25:34,037 INFO ]: Interprodecural is true [2018-06-25 13:25:34,037 INFO ]: Hoare is false [2018-06-25 13:25:34,037 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:25:34,037 INFO ]: Backedges is TWOTRACK [2018-06-25 13:25:34,037 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:25:34,038 INFO ]: Difference is false [2018-06-25 13:25:34,038 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:25:34,038 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:25:34,056 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:25:34,072 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:25:34,072 INFO ]: Found error trace [2018-06-25 13:25:34,072 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:25:34,075 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:25:34,080 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:25:34,083 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:25:34,084 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:25:34,114 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:34,114 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:25:34,114 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:34,145 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:34,228 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:34,230 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:25:34,230 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:25:34,232 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:25:34,248 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:25:34,248 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:25:34,251 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:25:34,337 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:25:34,337 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:25:34,337 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:25:34,339 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:25:34,339 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:25:34,345 INFO ]: With dead ends: 9 [2018-06-25 13:25:34,345 INFO ]: Without dead ends: 9 [2018-06-25 13:25:34,346 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 13:25:34,361 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:25:34,375 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:25:34,376 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:25:34,376 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:25:34,377 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:25:34,377 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:25:34,377 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:25:34,377 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:25:34,377 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:25:34,378 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:25:34,378 INFO ]: Found error trace [2018-06-25 13:25:34,378 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:25:34,378 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:25:34,378 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:25:34,378 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:25:34,378 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:25:34,379 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:34,379 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:25:34,379 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:34,396 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:34,507 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:34,508 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:25:34,508 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 13:25:34,515 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:25:34,556 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:34,564 INFO ]: Computing forward predicates... [2018-06-25 13:25:34,711 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:34,731 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:25:34,731 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:25:34,732 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:25:34,732 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:25:34,732 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:25:34,732 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:25:34,840 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:25:34,840 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:25:34,840 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:25:34,840 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:25:34,840 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:25:34,840 INFO ]: With dead ends: 10 [2018-06-25 13:25:34,840 INFO ]: Without dead ends: 10 [2018-06-25 13:25:34,841 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:25:34,841 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:25:34,842 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:25:34,842 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:25:34,843 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:25:34,843 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:25:34,843 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:25:34,843 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:25:34,843 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:25:34,843 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:25:34,843 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:25:34,843 INFO ]: Found error trace [2018-06-25 13:25:34,843 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:25:34,843 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:25:34,843 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 13:25:34,844 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:25:34,844 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:25:34,844 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:34,844 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:25:34,844 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:34,881 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:35,148 WARN ]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-25 13:25:35,149 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:35,149 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:25:35,149 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 13:25:35,165 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:25:35,224 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:25:35,224 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:35,226 INFO ]: Computing forward predicates... [2018-06-25 13:25:36,746 WARN ]: Spent 568.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 6 [2018-06-25 13:25:36,968 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:36,997 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:25:36,997 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-06-25 13:25:36,997 INFO ]: Interpolant automaton has 7 states [2018-06-25 13:25:36,998 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 13:25:36,998 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-25 13:25:36,998 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2018-06-25 13:25:37,194 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:25:37,194 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:25:37,195 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:25:37,195 INFO ]: Start accepts. Automaton has 7 states. Word has length 9 [2018-06-25 13:25:37,195 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:25:37,195 INFO ]: With dead ends: 11 [2018-06-25 13:25:37,195 INFO ]: Without dead ends: 11 [2018-06-25 13:25:37,195 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-06-25 13:25:37,196 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:25:37,197 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:25:37,197 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:25:37,197 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:25:37,197 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:25:37,197 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:25:37,197 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:25:37,197 INFO ]: Interpolant automaton has 7 states. [2018-06-25 13:25:37,197 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:25:37,197 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:25:37,197 INFO ]: Found error trace [2018-06-25 13:25:37,198 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:25:37,198 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:25:37,198 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-25 13:25:37,198 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:25:37,198 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:25:37,199 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:37,199 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:25:37,199 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:37,231 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:37,400 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:37,400 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:25:37,400 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 13:25:37,412 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:25:37,463 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:25:37,463 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:37,466 INFO ]: Computing forward predicates... [2018-06-25 13:25:37,846 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:37,868 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:25:37,868 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 13:25:37,868 INFO ]: Interpolant automaton has 7 states [2018-06-25 13:25:37,868 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 13:25:37,868 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-25 13:25:37,869 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-25 13:25:38,057 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:25:38,057 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 13:25:38,057 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 13:25:38,057 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-25 13:25:38,057 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:25:38,057 INFO ]: With dead ends: 12 [2018-06-25 13:25:38,057 INFO ]: Without dead ends: 12 [2018-06-25 13:25:38,058 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-06-25 13:25:38,058 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 13:25:38,059 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 13:25:38,059 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 13:25:38,059 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 13:25:38,059 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 13:25:38,059 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:25:38,059 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 13:25:38,059 INFO ]: Interpolant automaton has 7 states. [2018-06-25 13:25:38,059 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 13:25:38,060 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 13:25:38,060 INFO ]: Found error trace [2018-06-25 13:25:38,060 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:25:38,060 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:25:38,060 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-25 13:25:38,060 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:25:38,060 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:25:38,061 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:38,061 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:25:38,061 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:38,106 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:38,213 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:38,213 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:25:38,213 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:25:38,219 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:25:38,240 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:25:38,240 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:38,242 INFO ]: Computing forward predicates... [2018-06-25 13:25:38,715 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:38,734 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:25:38,734 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-25 13:25:38,734 INFO ]: Interpolant automaton has 8 states [2018-06-25 13:25:38,734 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 13:25:38,735 INFO ]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:25:38,735 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-25 13:25:38,899 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:25:38,899 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:25:38,899 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:25:38,899 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-25 13:25:38,899 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:25:38,899 INFO ]: With dead ends: 13 [2018-06-25 13:25:38,899 INFO ]: Without dead ends: 13 [2018-06-25 13:25:38,899 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-06-25 13:25:38,900 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:25:38,901 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:25:38,901 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:25:38,901 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:25:38,901 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 13:25:38,901 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:25:38,901 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:25:38,901 INFO ]: Interpolant automaton has 8 states. [2018-06-25 13:25:38,901 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:25:38,902 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:25:38,902 INFO ]: Found error trace [2018-06-25 13:25:38,902 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:25:38,902 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:25:38,902 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-25 13:25:38,902 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:25:38,902 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:25:38,903 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:38,903 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:25:38,903 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:38,925 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:39,075 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:39,075 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:25:39,075 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 13:25:39,081 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 13:25:39,149 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-25 13:25:39,149 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:39,152 INFO ]: Computing forward predicates... [2018-06-25 13:25:40,170 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:40,204 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:25:40,223 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-25 13:25:40,223 INFO ]: Interpolant automaton has 9 states [2018-06-25 13:25:40,223 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-25 13:25:40,223 INFO ]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-25 13:25:40,224 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-06-25 13:25:40,954 WARN ]: Spent 464.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-06-25 13:25:41,078 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:25:41,078 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-25 13:25:41,078 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 13:25:41,078 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-25 13:25:41,078 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:25:41,078 INFO ]: With dead ends: 14 [2018-06-25 13:25:41,078 INFO ]: Without dead ends: 14 [2018-06-25 13:25:41,079 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2018-06-25 13:25:41,079 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-25 13:25:41,080 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-25 13:25:41,080 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-25 13:25:41,080 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-25 13:25:41,081 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-25 13:25:41,081 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:25:41,081 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-25 13:25:41,081 INFO ]: Interpolant automaton has 9 states. [2018-06-25 13:25:41,081 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-25 13:25:41,081 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-25 13:25:41,081 INFO ]: Found error trace [2018-06-25 13:25:41,081 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:25:41,081 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:25:41,081 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-25 13:25:41,081 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:25:41,081 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:25:41,082 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:41,082 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:25:41,082 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:41,105 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:41,207 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:41,207 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:25:41,207 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 13:25:41,213 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-25 13:25:41,240 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-25 13:25:41,240 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:41,243 INFO ]: Computing forward predicates... [2018-06-25 13:25:42,561 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:42,593 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:25:42,593 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-06-25 13:25:42,593 INFO ]: Interpolant automaton has 10 states [2018-06-25 13:25:42,593 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 13:25:42,594 INFO ]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-06-25 13:25:42,594 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-06-25 13:25:42,839 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:25:42,839 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 13:25:42,839 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-25 13:25:42,839 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-25 13:25:42,839 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:25:42,840 INFO ]: With dead ends: 15 [2018-06-25 13:25:42,840 INFO ]: Without dead ends: 15 [2018-06-25 13:25:42,840 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2018-06-25 13:25:42,840 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 13:25:42,842 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 13:25:42,842 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 13:25:42,842 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 13:25:42,842 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-25 13:25:42,842 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:25:42,842 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 13:25:42,842 INFO ]: Interpolant automaton has 10 states. [2018-06-25 13:25:42,842 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 13:25:42,843 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 13:25:42,843 INFO ]: Found error trace [2018-06-25 13:25:42,843 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:25:42,843 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:25:42,843 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 7 times [2018-06-25 13:25:42,843 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:25:42,843 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:25:42,844 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:42,844 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:25:42,844 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:42,878 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:43,170 WARN ]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-25 13:25:43,263 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:43,264 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:25:43,264 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 13:25:43,280 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:25:43,307 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:43,310 INFO ]: Computing forward predicates... [2018-06-25 13:25:45,671 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 14 [2018-06-25 13:25:46,434 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:46,466 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:25:46,466 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2018-06-25 13:25:46,467 INFO ]: Interpolant automaton has 14 states [2018-06-25 13:25:46,467 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-25 13:25:46,467 INFO ]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-06-25 13:25:46,467 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-06-25 13:25:46,821 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:25:46,821 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-25 13:25:46,821 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-25 13:25:46,821 INFO ]: Start accepts. Automaton has 14 states. Word has length 14 [2018-06-25 13:25:46,821 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:25:46,821 INFO ]: With dead ends: 16 [2018-06-25 13:25:46,821 INFO ]: Without dead ends: 16 [2018-06-25 13:25:46,822 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2018-06-25 13:25:46,822 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-25 13:25:46,823 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-25 13:25:46,823 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-25 13:25:46,824 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-25 13:25:46,824 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-06-25 13:25:46,824 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:25:46,824 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-25 13:25:46,824 INFO ]: Interpolant automaton has 14 states. [2018-06-25 13:25:46,824 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-25 13:25:46,824 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-25 13:25:46,824 INFO ]: Found error trace [2018-06-25 13:25:46,824 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:25:46,824 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:25:46,825 INFO ]: Analyzing trace with hash 1051911180, now seen corresponding path program 8 times [2018-06-25 13:25:46,825 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:25:46,825 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:25:46,825 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:46,825 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:25:46,825 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:46,876 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:47,787 WARN ]: Spent 726.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-25 13:25:48,257 WARN ]: Spent 415.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-06-25 13:25:48,344 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:48,344 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:25:48,344 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:25:48,358 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:25:48,391 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:25:48,391 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:48,394 INFO ]: Computing forward predicates... [2018-06-25 13:25:54,351 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:54,370 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:25:54,370 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-06-25 13:25:54,370 INFO ]: Interpolant automaton has 15 states [2018-06-25 13:25:54,371 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-25 13:25:54,371 INFO ]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-06-25 13:25:54,371 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-06-25 13:25:54,686 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2018-06-25 13:25:55,003 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:25:55,003 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-25 13:25:55,003 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-25 13:25:55,003 INFO ]: Start accepts. Automaton has 15 states. Word has length 15 [2018-06-25 13:25:55,003 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:25:55,003 INFO ]: With dead ends: 17 [2018-06-25 13:25:55,003 INFO ]: Without dead ends: 17 [2018-06-25 13:25:55,004 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2018-06-25 13:25:55,004 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-25 13:25:55,006 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-25 13:25:55,006 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-25 13:25:55,006 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-25 13:25:55,006 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-06-25 13:25:55,006 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:25:55,006 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-25 13:25:55,006 INFO ]: Interpolant automaton has 15 states. [2018-06-25 13:25:55,006 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-25 13:25:55,007 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-25 13:25:55,007 INFO ]: Found error trace [2018-06-25 13:25:55,007 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:25:55,007 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:25:55,007 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 9 times [2018-06-25 13:25:55,007 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:25:55,007 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:25:55,008 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:55,008 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:25:55,008 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:55,042 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:55,280 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:55,280 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:25:55,280 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:25:55,287 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:25:55,325 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-06-25 13:25:55,325 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:55,329 INFO ]: Computing forward predicates... [2018-06-25 13:25:56,728 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:56,748 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:25:56,748 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-06-25 13:25:56,748 INFO ]: Interpolant automaton has 16 states [2018-06-25 13:25:56,748 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-25 13:25:56,749 INFO ]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-06-25 13:25:56,749 INFO ]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-06-25 13:25:57,209 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:25:57,210 INFO ]: Finished difference Result 18 states and 18 transitions. [2018-06-25 13:25:57,210 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-25 13:25:57,210 INFO ]: Start accepts. Automaton has 16 states. Word has length 16 [2018-06-25 13:25:57,210 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:25:57,210 INFO ]: With dead ends: 18 [2018-06-25 13:25:57,210 INFO ]: Without dead ends: 18 [2018-06-25 13:25:57,211 INFO ]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2018-06-25 13:25:57,211 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-25 13:25:57,213 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-06-25 13:25:57,213 INFO ]: Start removeUnreachable. Operand 18 states. [2018-06-25 13:25:57,213 INFO ]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-06-25 13:25:57,213 INFO ]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-06-25 13:25:57,213 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:25:57,213 INFO ]: Abstraction has 18 states and 18 transitions. [2018-06-25 13:25:57,214 INFO ]: Interpolant automaton has 16 states. [2018-06-25 13:25:57,214 INFO ]: Start isEmpty. Operand 18 states and 18 transitions. [2018-06-25 13:25:57,215 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-25 13:25:57,215 INFO ]: Found error trace [2018-06-25 13:25:57,215 INFO ]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:25:57,215 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:25:57,215 INFO ]: Analyzing trace with hash 1509090572, now seen corresponding path program 10 times [2018-06-25 13:25:57,215 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:25:57,215 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:25:57,215 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:57,216 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:25:57,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:25:57,247 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:57,772 WARN ]: Spent 327.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-06-25 13:25:58,128 WARN ]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-25 13:25:58,251 INFO ]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:25:58,251 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:25:58,251 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:25:58,257 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:25:58,306 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:25:58,306 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:25:58,311 INFO ]: Computing forward predicates... [2018-06-25 13:26:00,103 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 14 [2018-06-25 13:26:00,263 INFO ]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:26:00,284 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:26:00,284 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2018-06-25 13:26:00,285 INFO ]: Interpolant automaton has 17 states [2018-06-25 13:26:00,285 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-25 13:26:00,285 INFO ]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-06-25 13:26:00,285 INFO ]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-06-25 13:26:00,472 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2018-06-25 13:26:00,900 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:26:00,900 INFO ]: Finished difference Result 19 states and 19 transitions. [2018-06-25 13:26:00,900 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-25 13:26:00,900 INFO ]: Start accepts. Automaton has 17 states. Word has length 17 [2018-06-25 13:26:00,900 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:26:00,901 INFO ]: With dead ends: 19 [2018-06-25 13:26:00,901 INFO ]: Without dead ends: 19 [2018-06-25 13:26:00,902 INFO ]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2018-06-25 13:26:00,902 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-25 13:26:00,904 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-25 13:26:00,904 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-25 13:26:00,905 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-06-25 13:26:00,905 INFO ]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-06-25 13:26:00,905 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:26:00,905 INFO ]: Abstraction has 19 states and 19 transitions. [2018-06-25 13:26:00,905 INFO ]: Interpolant automaton has 17 states. [2018-06-25 13:26:00,905 INFO ]: Start isEmpty. Operand 19 states and 19 transitions. [2018-06-25 13:26:00,905 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-25 13:26:00,905 INFO ]: Found error trace [2018-06-25 13:26:00,905 INFO ]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:26:00,905 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:26:00,905 INFO ]: Analyzing trace with hash -464714988, now seen corresponding path program 11 times [2018-06-25 13:26:00,905 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:26:00,905 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:26:00,906 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:26:00,906 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:26:00,906 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:26:00,973 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:26:01,515 INFO ]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:26:01,515 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:26:01,515 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:26:01,520 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 13:26:01,563 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-06-25 13:26:01,563 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:26:01,567 INFO ]: Computing forward predicates... [2018-06-25 13:26:02,115 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:26:03,274 WARN ]: Spent 370.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 22 [2018-06-25 13:26:03,603 INFO ]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:26:03,622 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:26:03,622 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2018-06-25 13:26:03,623 INFO ]: Interpolant automaton has 22 states [2018-06-25 13:26:03,623 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-25 13:26:03,623 INFO ]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2018-06-25 13:26:03,623 INFO ]: Start difference. First operand 19 states and 19 transitions. Second operand 22 states. [2018-06-25 13:26:03,989 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2018-06-25 13:26:03,992 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:26:03,992 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 13:26:03,995 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:26:03,995 INFO ]: Start accepts. Automaton has 22 states. Word has length 18 [2018-06-25 13:26:03,995 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:26:03,995 INFO ]: With dead ends: 15 [2018-06-25 13:26:03,995 INFO ]: Without dead ends: 0 [2018-06-25 13:26:03,996 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2018-06-25 13:26:03,996 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-25 13:26:03,996 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-25 13:26:03,996 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-25 13:26:03,996 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-25 13:26:03,996 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-06-25 13:26:03,996 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:26:03,996 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-25 13:26:03,996 INFO ]: Interpolant automaton has 22 states. [2018-06-25 13:26:03,996 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-25 13:26:03,996 INFO ]: Finished isEmpty. No accepting run. [2018-06-25 13:26:04,002 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:26:04 BoogieIcfgContainer [2018-06-25 13:26:04,002 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:26:04,002 INFO ]: Toolchain (without parser) took 30350.40 ms. Allocated memory was 308.8 MB in the beginning and 1.3 GB in the end (delta: 978.8 MB). Free memory was 263.3 MB in the beginning and 854.5 MB in the end (delta: -591.2 MB). Peak memory consumption was 387.7 MB. Max. memory is 3.6 GB. [2018-06-25 13:26:04,003 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:26:04,004 INFO ]: ChcToBoogie took 58.60 ms. Allocated memory is still 308.8 MB. Free memory was 263.3 MB in the beginning and 261.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:26:04,004 INFO ]: Boogie Preprocessor took 38.82 ms. Allocated memory is still 308.8 MB. Free memory was 261.3 MB in the beginning and 259.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:26:04,005 INFO ]: RCFGBuilder took 200.15 ms. Allocated memory is still 308.8 MB. Free memory was 259.4 MB in the beginning and 251.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:26:04,005 INFO ]: TraceAbstraction took 30041.81 ms. Allocated memory was 308.8 MB in the beginning and 1.3 GB in the end (delta: 978.8 MB). Free memory was 251.4 MB in the beginning and 854.5 MB in the end (delta: -603.1 MB). Peak memory consumption was 375.7 MB. Max. memory is 3.6 GB. [2018-06-25 13:26:04,008 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 308.8 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.60 ms. Allocated memory is still 308.8 MB. Free memory was 263.3 MB in the beginning and 261.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 38.82 ms. Allocated memory is still 308.8 MB. Free memory was 261.3 MB in the beginning and 259.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 200.15 ms. Allocated memory is still 308.8 MB. Free memory was 259.4 MB in the beginning and 251.4 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 30041.81 ms. Allocated memory was 308.8 MB in the beginning and 1.3 GB in the end (delta: 978.8 MB). Free memory was 251.4 MB in the beginning and 854.5 MB in the end (delta: -603.1 MB). Peak memory consumption was 375.7 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. SAFE Result, 29.9s OverallTime, 12 OverallIterations, 11 TraceHistogramMax, 4.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 80 SDtfs, 28 SDslu, 341 SDs, 0 SdLazy, 115 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 300 GetRequests, 86 SyntacticMatches, 39 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=11, 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, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 24.2s InterpolantComputationTime, 293 NumberOfCodeBlocks, 293 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 270 ConstructedInterpolants, 0 QuantifiedInterpolants, 23626 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1705 ConjunctsInSsa, 498 ConjunctsInUnsatCore, 23 InterpolantComputations, 1 PerfectInterpolantSequences, 0/572 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/pldi08.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-26-04-018.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/pldi08.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-26-04-018.csv Received shutdown request...