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_No_Goto.epf -i /storage/chc-comp/llreve-bench/smt2/loop__simple-loop.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:59:49,140 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:59:49,144 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:59:49,157 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:59:49,157 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:59:49,158 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:59:49,159 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:59:49,163 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:59:49,165 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:59:49,166 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:59:49,167 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:59:49,167 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:59:49,168 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:59:49,171 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:59:49,172 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:59:49,172 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:59:49,182 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:59:49,184 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:59:49,185 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:59:49,186 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:59:49,187 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:59:49,192 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:59:49,192 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:59:49,192 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:59:49,193 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:59:49,196 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:59:49,197 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:59:49,198 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:59:49,199 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:59:49,199 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:59:49,200 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:59:49,205 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:59:49,205 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:59:49,206 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:59:49,207 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:59:49,207 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 11:59:49,228 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:59:49,229 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:59:49,229 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:59:49,229 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:59:49,230 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:59:49,230 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:59:49,231 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:59:49,231 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:59:49,231 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:59:49,231 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:59:49,231 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:59:49,232 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:59:49,232 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:59:49,233 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:59:49,233 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:59:49,233 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:59:49,233 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:59:49,233 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:59:49,233 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:59:49,235 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:59:49,235 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:59:49,275 INFO ]: Repository-Root is: /tmp [2018-06-22 11:59:49,291 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:59:49,298 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:59:49,299 INFO ]: Initializing SmtParser... [2018-06-22 11:59:49,300 INFO ]: SmtParser initialized [2018-06-22 11:59:49,300 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/loop__simple-loop.smt2 [2018-06-22 11:59:49,302 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 11:59:49,399 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/loop__simple-loop.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@503f827a [2018-06-22 11:59:49,558 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/loop__simple-loop.smt2 [2018-06-22 11:59:49,562 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:59:49,567 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:59:49,568 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:59:49,568 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:59:49,569 INFO ]: ChcToBoogie initialized [2018-06-22 11:59:49,572 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:59:49" (1/1) ... [2018-06-22 11:59:49,622 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:49 Unit [2018-06-22 11:59:49,622 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:59:49,622 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:59:49,623 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:59:49,623 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:59:49,646 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:49" (1/1) ... [2018-06-22 11:59:49,646 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:49" (1/1) ... [2018-06-22 11:59:49,657 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:49" (1/1) ... [2018-06-22 11:59:49,658 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:49" (1/1) ... [2018-06-22 11:59:49,660 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:49" (1/1) ... [2018-06-22 11:59:49,661 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:49" (1/1) ... [2018-06-22 11:59:49,663 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:49" (1/1) ... [2018-06-22 11:59:49,664 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:59:49,665 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:59:49,665 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:59:49,667 INFO ]: RCFGBuilder initialized [2018-06-22 11:59:49,668 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:49" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 11:59:49,682 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:59:49,682 INFO ]: Found specification of procedure False [2018-06-22 11:59:49,682 INFO ]: Found implementation of procedure False [2018-06-22 11:59:49,682 INFO ]: Specification and implementation of procedure INV_MAIN_42 given in one single declaration [2018-06-22 11:59:49,682 INFO ]: Found specification of procedure INV_MAIN_42 [2018-06-22 11:59:49,682 INFO ]: Found implementation of procedure INV_MAIN_42 [2018-06-22 11:59:49,682 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:59:49,682 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:59:49,682 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:59:49,992 INFO ]: Using library mode [2018-06-22 11:59:49,992 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:59:49 BoogieIcfgContainer [2018-06-22 11:59:49,993 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:59:49,995 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:59:49,995 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:59:49,999 INFO ]: TraceAbstraction initialized [2018-06-22 11:59:49,999 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:59:49" (1/3) ... [2018-06-22 11:59:50,000 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e23d2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:59:50, skipping insertion in model container [2018-06-22 11:59:50,000 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:59:49" (2/3) ... [2018-06-22 11:59:50,001 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e23d2d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:59:50, skipping insertion in model container [2018-06-22 11:59:50,001 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:59:49" (3/3) ... [2018-06-22 11:59:50,002 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:59:50,011 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:59:50,018 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:59:50,050 INFO ]: Using default assertion order modulation [2018-06-22 11:59:50,050 INFO ]: Interprodecural is true [2018-06-22 11:59:50,050 INFO ]: Hoare is false [2018-06-22 11:59:50,050 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:59:50,050 INFO ]: Backedges is TWOTRACK [2018-06-22 11:59:50,050 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:59:50,050 INFO ]: Difference is false [2018-06-22 11:59:50,050 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:59:50,050 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:59:50,064 INFO ]: Start isEmpty. Operand 15 states. [2018-06-22 11:59:50,074 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 11:59:50,074 INFO ]: Found error trace [2018-06-22 11:59:50,075 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:50,075 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:50,079 INFO ]: Analyzing trace with hash -1140319126, now seen corresponding path program 1 times [2018-06-22 11:59:50,081 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:50,082 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:50,116 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:50,116 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:50,116 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:50,145 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:50,312 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:59:50,323 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:59:50,323 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:59:50,325 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:59:50,335 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:59:50,336 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:59:50,337 INFO ]: Start difference. First operand 15 states. Second operand 4 states. [2018-06-22 11:59:50,455 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:50,455 INFO ]: Finished difference Result 15 states and 22 transitions. [2018-06-22 11:59:50,455 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:59:50,457 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 11:59:50,457 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:50,467 INFO ]: With dead ends: 15 [2018-06-22 11:59:50,467 INFO ]: Without dead ends: 15 [2018-06-22 11:59:50,468 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:59:50,480 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 11:59:50,513 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 11:59:50,514 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 11:59:50,515 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2018-06-22 11:59:50,517 INFO ]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 9 [2018-06-22 11:59:50,518 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:50,518 INFO ]: Abstraction has 15 states and 22 transitions. [2018-06-22 11:59:50,518 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:59:50,518 INFO ]: Start isEmpty. Operand 15 states and 22 transitions. [2018-06-22 11:59:50,519 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:59:50,519 INFO ]: Found error trace [2018-06-22 11:59:50,519 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:50,520 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:50,523 INFO ]: Analyzing trace with hash -52273233, now seen corresponding path program 1 times [2018-06-22 11:59:50,523 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:50,524 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:50,524 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:50,524 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:50,524 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:50,533 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:50,571 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:59:50,572 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:59:50,572 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:59:50,573 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:59:50,573 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:59:50,573 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:59:50,573 INFO ]: Start difference. First operand 15 states and 22 transitions. Second operand 4 states. [2018-06-22 11:59:50,724 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:50,724 INFO ]: Finished difference Result 24 states and 43 transitions. [2018-06-22 11:59:50,724 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:59:50,724 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 11:59:50,724 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:50,726 INFO ]: With dead ends: 24 [2018-06-22 11:59:50,726 INFO ]: Without dead ends: 24 [2018-06-22 11:59:50,727 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:59:50,727 INFO ]: Start minimizeSevpa. Operand 24 states. [2018-06-22 11:59:50,738 INFO ]: Finished minimizeSevpa. Reduced states from 24 to 22. [2018-06-22 11:59:50,738 INFO ]: Start removeUnreachable. Operand 22 states. [2018-06-22 11:59:50,739 INFO ]: Finished removeUnreachable. Reduced from 22 states to 22 states and 38 transitions. [2018-06-22 11:59:50,739 INFO ]: Start accepts. Automaton has 22 states and 38 transitions. Word has length 13 [2018-06-22 11:59:50,739 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:50,739 INFO ]: Abstraction has 22 states and 38 transitions. [2018-06-22 11:59:50,740 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:59:50,740 INFO ]: Start isEmpty. Operand 22 states and 38 transitions. [2018-06-22 11:59:50,741 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:59:50,741 INFO ]: Found error trace [2018-06-22 11:59:50,741 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:50,741 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:50,741 INFO ]: Analyzing trace with hash 979031640, now seen corresponding path program 1 times [2018-06-22 11:59:50,741 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:50,741 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:50,743 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:50,743 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:50,743 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:50,753 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:50,943 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:59:50,944 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:50,944 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 11:59:50,957 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:59:50,991 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:50,999 INFO ]: Computing forward predicates... [2018-06-22 11:59:51,488 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:59:51,519 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:51,520 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 11:59:51,520 INFO ]: Interpolant automaton has 10 states [2018-06-22 11:59:51,520 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 11:59:51,520 INFO ]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:59:51,520 INFO ]: Start difference. First operand 22 states and 38 transitions. Second operand 10 states. [2018-06-22 11:59:52,349 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:52,349 INFO ]: Finished difference Result 46 states and 86 transitions. [2018-06-22 11:59:52,349 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 11:59:52,349 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 11:59:52,350 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:52,352 INFO ]: With dead ends: 46 [2018-06-22 11:59:52,352 INFO ]: Without dead ends: 46 [2018-06-22 11:59:52,352 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-06-22 11:59:52,352 INFO ]: Start minimizeSevpa. Operand 46 states. [2018-06-22 11:59:52,364 INFO ]: Finished minimizeSevpa. Reduced states from 46 to 34. [2018-06-22 11:59:52,365 INFO ]: Start removeUnreachable. Operand 34 states. [2018-06-22 11:59:52,367 INFO ]: Finished removeUnreachable. Reduced from 34 states to 34 states and 64 transitions. [2018-06-22 11:59:52,367 INFO ]: Start accepts. Automaton has 34 states and 64 transitions. Word has length 13 [2018-06-22 11:59:52,367 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:52,367 INFO ]: Abstraction has 34 states and 64 transitions. [2018-06-22 11:59:52,367 INFO ]: Interpolant automaton has 10 states. [2018-06-22 11:59:52,367 INFO ]: Start isEmpty. Operand 34 states and 64 transitions. [2018-06-22 11:59:52,368 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:59:52,368 INFO ]: Found error trace [2018-06-22 11:59:52,368 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:52,369 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:52,369 INFO ]: Analyzing trace with hash 1465316038, now seen corresponding path program 2 times [2018-06-22 11:59:52,369 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:52,369 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:52,370 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:52,370 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:52,370 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:52,379 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:52,450 INFO ]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 11:59:52,450 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:52,450 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 11:59:52,463 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:59:52,476 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:59:52,476 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:52,478 INFO ]: Computing forward predicates... [2018-06-22 11:59:52,620 INFO ]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 11:59:52,638 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:52,638 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-06-22 11:59:52,639 INFO ]: Interpolant automaton has 12 states [2018-06-22 11:59:52,639 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 11:59:52,639 INFO ]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-06-22 11:59:52,639 INFO ]: Start difference. First operand 34 states and 64 transitions. Second operand 12 states. [2018-06-22 11:59:53,233 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:53,233 INFO ]: Finished difference Result 68 states and 132 transitions. [2018-06-22 11:59:53,233 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-22 11:59:53,233 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 11:59:53,233 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:53,236 INFO ]: With dead ends: 68 [2018-06-22 11:59:53,236 INFO ]: Without dead ends: 68 [2018-06-22 11:59:53,236 INFO ]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2018-06-22 11:59:53,237 INFO ]: Start minimizeSevpa. Operand 68 states. [2018-06-22 11:59:53,251 INFO ]: Finished minimizeSevpa. Reduced states from 68 to 50. [2018-06-22 11:59:53,251 INFO ]: Start removeUnreachable. Operand 50 states. [2018-06-22 11:59:53,253 INFO ]: Finished removeUnreachable. Reduced from 50 states to 50 states and 101 transitions. [2018-06-22 11:59:53,253 INFO ]: Start accepts. Automaton has 50 states and 101 transitions. Word has length 17 [2018-06-22 11:59:53,253 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:53,253 INFO ]: Abstraction has 50 states and 101 transitions. [2018-06-22 11:59:53,253 INFO ]: Interpolant automaton has 12 states. [2018-06-22 11:59:53,253 INFO ]: Start isEmpty. Operand 50 states and 101 transitions. [2018-06-22 11:59:53,255 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:59:53,255 INFO ]: Found error trace [2018-06-22 11:59:53,255 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:53,256 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:53,256 INFO ]: Analyzing trace with hash 1839911348, now seen corresponding path program 3 times [2018-06-22 11:59:53,256 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:53,256 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:53,257 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:53,257 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:59:53,257 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:53,267 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:53,363 INFO ]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-06-22 11:59:53,364 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:53,364 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 11:59:53,372 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:59:53,386 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-06-22 11:59:53,386 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:53,388 INFO ]: Computing forward predicates... [2018-06-22 11:59:53,427 INFO ]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-06-22 11:59:53,447 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:53,447 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2018-06-22 11:59:53,447 INFO ]: Interpolant automaton has 10 states [2018-06-22 11:59:53,448 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 11:59:53,448 INFO ]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:59:53,448 INFO ]: Start difference. First operand 50 states and 101 transitions. Second operand 10 states. [2018-06-22 11:59:53,704 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:53,704 INFO ]: Finished difference Result 94 states and 195 transitions. [2018-06-22 11:59:53,704 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 11:59:53,704 INFO ]: Start accepts. Automaton has 10 states. Word has length 21 [2018-06-22 11:59:53,704 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:53,707 INFO ]: With dead ends: 94 [2018-06-22 11:59:53,707 INFO ]: Without dead ends: 94 [2018-06-22 11:59:53,708 INFO ]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-06-22 11:59:53,708 INFO ]: Start minimizeSevpa. Operand 94 states. [2018-06-22 11:59:53,731 INFO ]: Finished minimizeSevpa. Reduced states from 94 to 74. [2018-06-22 11:59:53,731 INFO ]: Start removeUnreachable. Operand 74 states. [2018-06-22 11:59:53,734 INFO ]: Finished removeUnreachable. Reduced from 74 states to 74 states and 152 transitions. [2018-06-22 11:59:53,734 INFO ]: Start accepts. Automaton has 74 states and 152 transitions. Word has length 21 [2018-06-22 11:59:53,734 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:53,734 INFO ]: Abstraction has 74 states and 152 transitions. [2018-06-22 11:59:53,734 INFO ]: Interpolant automaton has 10 states. [2018-06-22 11:59:53,734 INFO ]: Start isEmpty. Operand 74 states and 152 transitions. [2018-06-22 11:59:53,737 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 11:59:53,737 INFO ]: Found error trace [2018-06-22 11:59:53,737 INFO ]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:53,737 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:53,737 INFO ]: Analyzing trace with hash 1239405316, now seen corresponding path program 1 times [2018-06-22 11:59:53,737 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:53,737 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:53,738 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:53,738 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:59:53,738 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:53,750 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:53,890 INFO ]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 11:59:53,890 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:53,890 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 11:59:53,904 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:53,928 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:53,931 INFO ]: Computing forward predicates... [2018-06-22 11:59:53,950 INFO ]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 11:59:53,970 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:53,970 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-06-22 11:59:53,970 INFO ]: Interpolant automaton has 11 states [2018-06-22 11:59:53,970 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 11:59:53,970 INFO ]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-06-22 11:59:53,970 INFO ]: Start difference. First operand 74 states and 152 transitions. Second operand 11 states. [2018-06-22 11:59:54,229 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:54,229 INFO ]: Finished difference Result 286 states and 612 transitions. [2018-06-22 11:59:54,231 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-06-22 11:59:54,231 INFO ]: Start accepts. Automaton has 11 states. Word has length 29 [2018-06-22 11:59:54,231 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:54,240 INFO ]: With dead ends: 286 [2018-06-22 11:59:54,240 INFO ]: Without dead ends: 286 [2018-06-22 11:59:54,240 INFO ]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2018-06-22 11:59:54,241 INFO ]: Start minimizeSevpa. Operand 286 states. [2018-06-22 11:59:54,289 INFO ]: Finished minimizeSevpa. Reduced states from 286 to 166. [2018-06-22 11:59:54,289 INFO ]: Start removeUnreachable. Operand 166 states. [2018-06-22 11:59:54,293 INFO ]: Finished removeUnreachable. Reduced from 166 states to 166 states and 352 transitions. [2018-06-22 11:59:54,293 INFO ]: Start accepts. Automaton has 166 states and 352 transitions. Word has length 29 [2018-06-22 11:59:54,294 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:54,294 INFO ]: Abstraction has 166 states and 352 transitions. [2018-06-22 11:59:54,294 INFO ]: Interpolant automaton has 11 states. [2018-06-22 11:59:54,294 INFO ]: Start isEmpty. Operand 166 states and 352 transitions. [2018-06-22 11:59:54,298 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 11:59:54,298 INFO ]: Found error trace [2018-06-22 11:59:54,298 INFO ]: trace histogram [7, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:54,299 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:54,299 INFO ]: Analyzing trace with hash 1934542950, now seen corresponding path program 2 times [2018-06-22 11:59:54,299 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:54,299 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:54,299 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:54,299 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:59:54,300 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:54,310 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:54,342 INFO ]: Checked inductivity of 70 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-06-22 11:59:54,342 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:59:54,342 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:59:54,342 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:59:54,342 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:59:54,343 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:59:54,343 INFO ]: Start difference. First operand 166 states and 352 transitions. Second operand 4 states. [2018-06-22 11:59:54,378 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:54,378 INFO ]: Finished difference Result 151 states and 232 transitions. [2018-06-22 11:59:54,379 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 11:59:54,379 INFO ]: Start accepts. Automaton has 4 states. Word has length 33 [2018-06-22 11:59:54,379 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:54,380 INFO ]: With dead ends: 151 [2018-06-22 11:59:54,380 INFO ]: Without dead ends: 88 [2018-06-22 11:59:54,381 INFO ]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:59:54,381 INFO ]: Start minimizeSevpa. Operand 88 states. [2018-06-22 11:59:54,408 INFO ]: Finished minimizeSevpa. Reduced states from 88 to 70. [2018-06-22 11:59:54,408 INFO ]: Start removeUnreachable. Operand 70 states. [2018-06-22 11:59:54,409 INFO ]: Finished removeUnreachable. Reduced from 70 states to 70 states and 119 transitions. [2018-06-22 11:59:54,409 INFO ]: Start accepts. Automaton has 70 states and 119 transitions. Word has length 33 [2018-06-22 11:59:54,409 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:54,409 INFO ]: Abstraction has 70 states and 119 transitions. [2018-06-22 11:59:54,409 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:59:54,409 INFO ]: Start isEmpty. Operand 70 states and 119 transitions. [2018-06-22 11:59:54,411 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 11:59:54,411 INFO ]: Found error trace [2018-06-22 11:59:54,411 INFO ]: trace histogram [7, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:59:54,411 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:59:54,412 INFO ]: Analyzing trace with hash -1453519770, now seen corresponding path program 3 times [2018-06-22 11:59:54,412 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:59:54,412 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:59:54,416 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:54,416 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:59:54,416 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:59:54,436 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:54,525 INFO ]: Checked inductivity of 70 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-06-22 11:59:54,526 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:59:54,526 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 11:59:54,532 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:59:54,545 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 11:59:54,545 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:59:54,547 INFO ]: Computing forward predicates... [2018-06-22 11:59:54,598 INFO ]: Checked inductivity of 70 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-06-22 11:59:54,630 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:59:54,630 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2018-06-22 11:59:54,630 INFO ]: Interpolant automaton has 13 states [2018-06-22 11:59:54,631 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 11:59:54,631 INFO ]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-06-22 11:59:54,631 INFO ]: Start difference. First operand 70 states and 119 transitions. Second operand 13 states. [2018-06-22 11:59:55,068 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:59:55,069 INFO ]: Finished difference Result 127 states and 203 transitions. [2018-06-22 11:59:55,069 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 11:59:55,069 INFO ]: Start accepts. Automaton has 13 states. Word has length 33 [2018-06-22 11:59:55,069 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:59:55,069 INFO ]: With dead ends: 127 [2018-06-22 11:59:55,069 INFO ]: Without dead ends: 0 [2018-06-22 11:59:55,069 INFO ]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2018-06-22 11:59:55,069 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 11:59:55,069 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 11:59:55,069 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 11:59:55,069 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 11:59:55,069 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-06-22 11:59:55,069 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:59:55,070 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 11:59:55,070 INFO ]: Interpolant automaton has 13 states. [2018-06-22 11:59:55,070 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 11:59:55,070 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 11:59:55,074 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:59:55 BoogieIcfgContainer [2018-06-22 11:59:55,074 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:59:55,075 INFO ]: Toolchain (without parser) took 5512.47 ms. Allocated memory was 304.6 MB in the beginning and 363.3 MB in the end (delta: 58.7 MB). Free memory was 262.0 MB in the beginning and 324.5 MB in the end (delta: -62.5 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:59:55,076 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:59:55,077 INFO ]: ChcToBoogie took 53.92 ms. Allocated memory is still 304.6 MB. Free memory was 262.0 MB in the beginning and 260.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:59:55,077 INFO ]: Boogie Preprocessor took 41.64 ms. Allocated memory is still 304.6 MB. Free memory was 260.0 MB in the beginning and 258.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:59:55,078 INFO ]: RCFGBuilder took 328.01 ms. Allocated memory is still 304.6 MB. Free memory was 258.0 MB in the beginning and 252.0 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:59:55,078 INFO ]: TraceAbstraction took 5079.46 ms. Allocated memory was 304.6 MB in the beginning and 363.3 MB in the end (delta: 58.7 MB). Free memory was 252.0 MB in the beginning and 324.5 MB in the end (delta: -72.5 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:59:55,082 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 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 53.92 ms. Allocated memory is still 304.6 MB. Free memory was 262.0 MB in the beginning and 260.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 41.64 ms. Allocated memory is still 304.6 MB. Free memory was 260.0 MB in the beginning and 258.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 328.01 ms. Allocated memory is still 304.6 MB. Free memory was 258.0 MB in the beginning and 252.0 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 5079.46 ms. Allocated memory was 304.6 MB in the beginning and 363.3 MB in the end (delta: 58.7 MB). Free memory was 252.0 MB in the beginning and 324.5 MB in the end (delta: -72.5 MB). There was no memory consumed. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. SAFE Result, 5.0s OverallTime, 8 OverallIterations, 7 TraceHistogramMax, 2.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 128 SDtfs, 73 SDslu, 328 SDs, 0 SdLazy, 580 SolverSat, 265 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 233 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=6, 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 190 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 281 NumberOfCodeBlocks, 261 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 268 ConstructedInterpolants, 0 QuantifiedInterpolants, 13904 SizeOfPredicates, 19 NumberOfNonLiveVariables, 297 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 269/383 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/loop__simple-loop.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-59-55-093.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/loop__simple-loop.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-59-55-093.csv Received shutdown request...