java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/up-nested.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 06:07:56,149 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 06:07:56,152 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 06:07:56,168 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 06:07:56,168 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 06:07:56,169 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 06:07:56,170 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 06:07:56,176 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 06:07:56,178 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 06:07:56,179 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 06:07:56,179 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 06:07:56,180 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 06:07:56,181 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 06:07:56,182 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 06:07:56,182 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 06:07:56,183 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 06:07:56,187 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 06:07:56,189 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 06:07:56,199 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 06:07:56,200 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 06:07:56,201 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 06:07:56,204 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 06:07:56,206 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 06:07:56,207 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 06:07:56,207 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 06:07:56,208 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 06:07:56,209 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 06:07:56,210 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 06:07:56,211 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 06:07:56,211 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 06:07:56,212 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 06:07:56,213 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 06:07:56,213 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 06:07:56,213 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 06:07:56,219 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 06:07:56,220 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 06:07:56,241 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 06:07:56,241 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 06:07:56,242 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 06:07:56,242 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 06:07:56,243 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 06:07:56,243 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 06:07:56,244 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 06:07:56,244 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 06:07:56,244 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 06:07:56,244 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 06:07:56,244 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 06:07:56,245 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 06:07:56,245 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 06:07:56,245 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 06:07:56,245 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 06:07:56,245 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 06:07:56,245 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 06:07:56,249 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 06:07:56,249 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 06:07:56,296 INFO ]: Repository-Root is: /tmp [2018-06-22 06:07:56,309 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 06:07:56,314 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 06:07:56,315 INFO ]: Initializing SmtParser... [2018-06-22 06:07:56,316 INFO ]: SmtParser initialized [2018-06-22 06:07:56,317 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/up-nested.c.smt2 [2018-06-22 06:07:56,318 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 06:07:56,429 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/up-nested.c.smt2 unknown [2018-06-22 06:07:56,844 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/up-nested.c.smt2 [2018-06-22 06:07:56,849 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 06:07:56,856 INFO ]: Walking toolchain with 4 elements. [2018-06-22 06:07:56,856 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 06:07:56,856 INFO ]: Initializing ChcToBoogie... [2018-06-22 06:07:56,856 INFO ]: ChcToBoogie initialized [2018-06-22 06:07:56,926 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 06:07:56" (1/1) ... [2018-06-22 06:07:57,018 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:07:57 Unit [2018-06-22 06:07:57,018 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 06:07:57,018 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 06:07:57,018 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 06:07:57,018 INFO ]: Boogie Preprocessor initialized [2018-06-22 06:07:57,140 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:07:57" (1/1) ... [2018-06-22 06:07:57,140 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:07:57" (1/1) ... [2018-06-22 06:07:57,180 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:07:57" (1/1) ... [2018-06-22 06:07:57,181 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:07:57" (1/1) ... [2018-06-22 06:07:57,184 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:07:57" (1/1) ... [2018-06-22 06:07:57,185 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:07:57" (1/1) ... [2018-06-22 06:07:57,187 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:07:57" (1/1) ... [2018-06-22 06:07:57,192 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 06:07:57,193 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 06:07:57,193 INFO ]: Initializing RCFGBuilder... [2018-06-22 06:07:57,193 INFO ]: RCFGBuilder initialized [2018-06-22 06:07:57,194 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:07:57" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 06:07:57,246 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 06:07:57,247 INFO ]: Found specification of procedure gotoProc [2018-06-22 06:07:57,247 INFO ]: Found implementation of procedure gotoProc [2018-06-22 06:07:57,247 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 06:07:57,247 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 06:07:57,247 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 06:07:57,613 INFO ]: Using library mode [2018-06-22 06:07:57,613 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 06:07:57 BoogieIcfgContainer [2018-06-22 06:07:57,613 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 06:07:57,614 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 06:07:57,614 INFO ]: Initializing TraceAbstraction... [2018-06-22 06:07:57,715 INFO ]: TraceAbstraction initialized [2018-06-22 06:07:57,716 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 06:07:56" (1/3) ... [2018-06-22 06:07:57,716 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e90382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 06:07:57, skipping insertion in model container [2018-06-22 06:07:57,716 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 06:07:57" (2/3) ... [2018-06-22 06:07:57,717 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e90382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 06:07:57, skipping insertion in model container [2018-06-22 06:07:57,717 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 06:07:57" (3/3) ... [2018-06-22 06:07:57,718 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 06:07:57,959 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 06:07:57,998 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 06:07:58,464 INFO ]: Using default assertion order modulation [2018-06-22 06:07:58,464 INFO ]: Interprodecural is true [2018-06-22 06:07:58,465 INFO ]: Hoare is false [2018-06-22 06:07:58,465 INFO ]: Compute interpolants for FPandBP [2018-06-22 06:07:58,465 INFO ]: Backedges is TWOTRACK [2018-06-22 06:07:58,465 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 06:07:58,465 INFO ]: Difference is false [2018-06-22 06:07:58,465 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 06:07:58,465 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 06:07:58,549 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 06:07:58,656 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 06:07:58,656 INFO ]: Found error trace [2018-06-22 06:07:58,675 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:07:58,675 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:07:58,691 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 06:07:58,693 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:07:58,754 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:07:59,132 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:07:59,132 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 06:07:59,132 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:07:59,299 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:07:59,423 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:07:59,425 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 06:07:59,425 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 06:07:59,426 INFO ]: Interpolant automaton has 3 states [2018-06-22 06:07:59,569 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 06:07:59,569 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 06:07:59,810 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 06:08:00,372 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:00,372 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 06:08:00,372 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 06:08:00,394 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 06:08:00,394 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:00,488 INFO ]: With dead ends: 9 [2018-06-22 06:08:00,488 INFO ]: Without dead ends: 9 [2018-06-22 06:08:00,519 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 06:08:00,610 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 06:08:00,634 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 06:08:00,635 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 06:08:00,636 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 06:08:00,637 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 06:08:00,637 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:00,637 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 06:08:00,638 INFO ]: Interpolant automaton has 3 states. [2018-06-22 06:08:00,638 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 06:08:00,638 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 06:08:00,638 INFO ]: Found error trace [2018-06-22 06:08:00,638 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:00,638 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:00,638 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 06:08:00,638 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:00,638 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:00,639 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:00,639 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 06:08:00,639 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:00,671 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:00,754 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:00,755 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:08:00,755 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 [2018-06-22 06:08:00,768 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 06:08:00,827 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:00,837 INFO ]: Computing forward predicates... [2018-06-22 06:08:01,230 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:01,265 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:08:01,265 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 06:08:01,265 INFO ]: Interpolant automaton has 5 states [2018-06-22 06:08:01,266 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 06:08:01,266 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 06:08:01,266 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 06:08:01,353 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:01,353 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 06:08:01,353 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 06:08:01,353 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 06:08:01,353 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:01,353 INFO ]: With dead ends: 11 [2018-06-22 06:08:01,353 INFO ]: Without dead ends: 11 [2018-06-22 06:08:01,354 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 06:08:01,354 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 06:08:01,355 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 06:08:01,355 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 06:08:01,355 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 06:08:01,355 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 06:08:01,355 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:01,355 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 06:08:01,355 INFO ]: Interpolant automaton has 5 states. [2018-06-22 06:08:01,355 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 06:08:01,356 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 06:08:01,356 INFO ]: Found error trace [2018-06-22 06:08:01,356 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:01,356 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:01,356 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-22 06:08:01,356 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:01,356 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:01,357 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:01,357 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 06:08:01,357 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:01,414 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:01,737 WARN ]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 06:08:01,764 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:01,764 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:08:01,764 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 06:08:01,774 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 06:08:01,819 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 06:08:01,819 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:01,822 INFO ]: Computing forward predicates... [2018-06-22 06:08:02,424 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:02,445 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:08:02,445 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 06:08:02,445 INFO ]: Interpolant automaton has 7 states [2018-06-22 06:08:02,445 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 06:08:02,445 INFO ]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-06-22 06:08:02,445 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 06:08:02,640 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-06-22 06:08:02,917 WARN ]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 06:08:03,284 WARN ]: Spent 279.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-06-22 06:08:03,286 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:03,286 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 06:08:03,286 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 06:08:03,286 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 06:08:03,286 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:03,286 INFO ]: With dead ends: 12 [2018-06-22 06:08:03,286 INFO ]: Without dead ends: 12 [2018-06-22 06:08:03,287 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-06-22 06:08:03,287 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 06:08:03,288 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 06:08:03,288 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 06:08:03,288 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 06:08:03,288 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 06:08:03,288 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:03,288 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 06:08:03,288 INFO ]: Interpolant automaton has 7 states. [2018-06-22 06:08:03,288 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 06:08:03,289 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 06:08:03,289 INFO ]: Found error trace [2018-06-22 06:08:03,289 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:03,289 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:03,289 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 3 times [2018-06-22 06:08:03,289 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:03,289 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:03,290 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:03,290 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 06:08:03,290 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:03,321 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:03,541 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:03,541 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:08:03,541 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 06:08:03,552 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 06:08:03,631 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 06:08:03,631 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:03,634 INFO ]: Computing forward predicates... [2018-06-22 06:08:04,402 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:04,421 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:08:04,421 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-22 06:08:04,422 INFO ]: Interpolant automaton has 8 states [2018-06-22 06:08:04,422 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 06:08:04,422 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-22 06:08:04,422 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-22 06:08:04,634 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:04,634 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 06:08:04,634 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 06:08:04,634 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-22 06:08:04,635 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:04,635 INFO ]: With dead ends: 13 [2018-06-22 06:08:04,635 INFO ]: Without dead ends: 13 [2018-06-22 06:08:04,635 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-06-22 06:08:04,636 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 06:08:04,637 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 06:08:04,637 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 06:08:04,637 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 06:08:04,637 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 06:08:04,637 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:04,637 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 06:08:04,637 INFO ]: Interpolant automaton has 8 states. [2018-06-22 06:08:04,637 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 06:08:04,638 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 06:08:04,638 INFO ]: Found error trace [2018-06-22 06:08:04,638 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:04,638 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:04,638 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 4 times [2018-06-22 06:08:04,638 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:04,638 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:04,639 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:04,639 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 06:08:04,639 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:04,673 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:04,959 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:04,959 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:08:04,959 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 [2018-06-22 06:08:04,964 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 06:08:05,010 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 06:08:05,010 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:05,013 INFO ]: Computing forward predicates... [2018-06-22 06:08:12,563 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:12,582 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:08:12,582 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-22 06:08:12,583 INFO ]: Interpolant automaton has 10 states [2018-06-22 06:08:12,583 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 06:08:12,583 INFO ]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-22 06:08:12,583 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-06-22 06:08:12,867 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:12,867 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 06:08:12,928 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 06:08:12,928 INFO ]: Start accepts. Automaton has 10 states. Word has length 12 [2018-06-22 06:08:12,928 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:12,929 INFO ]: With dead ends: 14 [2018-06-22 06:08:12,929 INFO ]: Without dead ends: 14 [2018-06-22 06:08:12,929 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2018-06-22 06:08:12,929 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 06:08:12,933 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 06:08:12,933 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 06:08:12,933 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 06:08:12,933 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 06:08:12,933 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:12,933 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 06:08:12,933 INFO ]: Interpolant automaton has 10 states. [2018-06-22 06:08:12,933 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 06:08:12,934 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 06:08:12,934 INFO ]: Found error trace [2018-06-22 06:08:12,934 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:12,934 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:12,934 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 5 times [2018-06-22 06:08:12,934 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:12,934 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:12,934 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:12,935 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 06:08:12,935 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:12,966 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:13,195 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:13,195 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:08:13,195 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 [2018-06-22 06:08:13,201 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 06:08:13,237 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 06:08:13,237 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:13,240 INFO ]: Computing forward predicates... [2018-06-22 06:08:13,725 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 06:08:17,230 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:17,251 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:08:17,251 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2018-06-22 06:08:17,251 INFO ]: Interpolant automaton has 15 states [2018-06-22 06:08:17,251 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 06:08:17,251 INFO ]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-06-22 06:08:17,251 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 15 states. [2018-06-22 06:08:17,542 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:17,542 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 06:08:17,542 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 06:08:17,542 INFO ]: Start accepts. Automaton has 15 states. Word has length 13 [2018-06-22 06:08:17,542 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:17,542 INFO ]: With dead ends: 15 [2018-06-22 06:08:17,542 INFO ]: Without dead ends: 15 [2018-06-22 06:08:17,543 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2018-06-22 06:08:17,543 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 06:08:17,544 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 06:08:17,544 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 06:08:17,544 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 06:08:17,544 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 06:08:17,544 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:17,544 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 06:08:17,544 INFO ]: Interpolant automaton has 15 states. [2018-06-22 06:08:17,544 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 06:08:17,544 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 06:08:17,544 INFO ]: Found error trace [2018-06-22 06:08:17,544 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:17,545 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:17,545 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 6 times [2018-06-22 06:08:17,545 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:17,545 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:17,545 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:17,545 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 06:08:17,545 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:17,590 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:18,717 WARN ]: Spent 870.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 11 [2018-06-22 06:08:18,905 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:18,905 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:08:18,905 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) [2018-06-22 06:08:18,919 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 06:08:18,971 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-22 06:08:18,971 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:18,975 INFO ]: Computing forward predicates... [2018-06-22 06:08:25,011 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:25,035 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:08:25,035 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 06:08:25,035 INFO ]: Interpolant automaton has 17 states [2018-06-22 06:08:25,035 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 06:08:25,036 INFO ]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2018-06-22 06:08:25,036 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 17 states. [2018-06-22 06:08:25,191 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2018-06-22 06:08:25,565 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:25,565 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-22 06:08:25,566 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 06:08:25,566 INFO ]: Start accepts. Automaton has 17 states. Word has length 14 [2018-06-22 06:08:25,566 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:25,566 INFO ]: With dead ends: 16 [2018-06-22 06:08:25,566 INFO ]: Without dead ends: 16 [2018-06-22 06:08:25,567 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2018-06-22 06:08:25,567 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-22 06:08:25,569 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-22 06:08:25,569 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-22 06:08:25,569 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-22 06:08:25,569 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-06-22 06:08:25,570 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:25,570 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-22 06:08:25,570 INFO ]: Interpolant automaton has 17 states. [2018-06-22 06:08:25,570 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-22 06:08:25,570 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 06:08:25,570 INFO ]: Found error trace [2018-06-22 06:08:25,570 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:25,570 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:25,570 INFO ]: Analyzing trace with hash 1051911180, now seen corresponding path program 7 times [2018-06-22 06:08:25,570 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:25,570 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:25,571 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:25,571 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 06:08:25,571 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:25,646 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:26,016 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-06-22 06:08:26,160 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:26,160 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:08:26,160 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 [2018-06-22 06:08:26,167 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 06:08:26,205 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:26,208 INFO ]: Computing forward predicates... [2018-06-22 06:08:27,714 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:27,733 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:08:27,733 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2018-06-22 06:08:27,733 INFO ]: Interpolant automaton has 18 states [2018-06-22 06:08:27,733 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 06:08:27,733 INFO ]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2018-06-22 06:08:27,734 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 18 states. [2018-06-22 06:08:28,250 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:28,250 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-22 06:08:28,250 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 06:08:28,250 INFO ]: Start accepts. Automaton has 18 states. Word has length 15 [2018-06-22 06:08:28,250 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:28,251 INFO ]: With dead ends: 17 [2018-06-22 06:08:28,251 INFO ]: Without dead ends: 17 [2018-06-22 06:08:28,251 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2018-06-22 06:08:28,251 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 06:08:28,253 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 06:08:28,253 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 06:08:28,253 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-22 06:08:28,253 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-06-22 06:08:28,254 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:28,254 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-22 06:08:28,254 INFO ]: Interpolant automaton has 18 states. [2018-06-22 06:08:28,254 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-22 06:08:28,254 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 06:08:28,254 INFO ]: Found error trace [2018-06-22 06:08:28,254 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 06:08:28,254 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 06:08:28,254 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 8 times [2018-06-22 06:08:28,254 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 06:08:28,254 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 06:08:28,255 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:28,255 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 06:08:28,255 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 06:08:28,312 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:28,819 INFO ]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 06:08:28,819 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 06:08:28,864 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 [2018-06-22 06:08:28,871 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 06:08:28,917 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 06:08:28,917 INFO ]: Conjunction of SSA is unsat [2018-06-22 06:08:28,920 INFO ]: Computing forward predicates... [2018-06-22 06:08:29,413 WARN ]: Spent 270.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-06-22 06:08:31,338 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 06:08:31,358 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 06:08:31,358 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2018-06-22 06:08:31,358 INFO ]: Interpolant automaton has 19 states [2018-06-22 06:08:31,358 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 06:08:31,358 INFO ]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2018-06-22 06:08:31,359 INFO ]: Start difference. First operand 17 states and 17 transitions. Second operand 19 states. [2018-06-22 06:08:31,444 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 06:08:31,444 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 06:08:31,444 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 06:08:31,444 INFO ]: Start accepts. Automaton has 19 states. Word has length 16 [2018-06-22 06:08:31,445 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 06:08:31,445 INFO ]: With dead ends: 13 [2018-06-22 06:08:31,445 INFO ]: Without dead ends: 0 [2018-06-22 06:08:31,445 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2018-06-22 06:08:31,445 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 06:08:31,445 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 06:08:31,445 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 06:08:31,445 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 06:08:31,445 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2018-06-22 06:08:31,445 INFO ]: Finished accepts. word is rejected. [2018-06-22 06:08:31,445 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 06:08:31,445 INFO ]: Interpolant automaton has 19 states. [2018-06-22 06:08:31,445 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 06:08:31,445 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 06:08:31,451 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 06:08:31 BoogieIcfgContainer [2018-06-22 06:08:31,451 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 06:08:31,452 INFO ]: Toolchain (without parser) took 34602.73 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 259.0 MB in the beginning and 1.1 GB in the end (delta: -885.6 MB). Peak memory consumption was 261.0 MB. Max. memory is 3.6 GB. [2018-06-22 06:08:31,453 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 304.6 MB. Free memory is still 269.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 06:08:31,453 INFO ]: ChcToBoogie took 161.76 ms. Allocated memory is still 304.6 MB. Free memory was 259.0 MB in the beginning and 257.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 06:08:31,453 INFO ]: Boogie Preprocessor took 174.07 ms. Allocated memory is still 304.6 MB. Free memory was 257.0 MB in the beginning and 255.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 06:08:31,455 INFO ]: RCFGBuilder took 420.31 ms. Allocated memory is still 304.6 MB. Free memory was 255.0 MB in the beginning and 247.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 06:08:31,456 INFO ]: TraceAbstraction took 33836.75 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 245.0 MB in the beginning and 1.1 GB in the end (delta: -899.6 MB). Peak memory consumption was 247.0 MB. Max. memory is 3.6 GB. [2018-06-22 06:08:31,459 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 304.6 MB. Free memory is still 269.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 161.76 ms. Allocated memory is still 304.6 MB. Free memory was 259.0 MB in the beginning and 257.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 174.07 ms. Allocated memory is still 304.6 MB. Free memory was 257.0 MB in the beginning and 255.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 420.31 ms. Allocated memory is still 304.6 MB. Free memory was 255.0 MB in the beginning and 247.0 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 33836.75 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 245.0 MB in the beginning and 1.1 GB in the end (delta: -899.6 MB). Peak memory consumption was 247.0 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, 32.9s OverallTime, 9 OverallIterations, 9 TraceHistogramMax, 4.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 59 SDtfs, 39 SDslu, 245 SDs, 0 SdLazy, 85 SolverSat, 97 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 203 GetRequests, 59 SyntacticMatches, 18 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=8, 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, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 26.9s InterpolantComputationTime, 205 NumberOfCodeBlocks, 205 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 188 ConstructedInterpolants, 0 QuantifiedInterpolants, 14548 SizeOfPredicates, 32 NumberOfNonLiveVariables, 1548 ConjunctsInSsa, 365 ConjunctsInUnsatCore, 17 InterpolantComputations, 1 PerfectInterpolantSequences, 1/324 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/up-nested.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_06-08-31-470.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/up-nested.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_06-08-31-470.csv Received shutdown request...