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/vmt-chc-benchmarks/lustre/speed2_e8_449_e7_353.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:53:48,157 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:53:48,160 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:53:48,172 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:53:48,173 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:53:48,174 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:53:48,175 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:53:48,178 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:53:48,180 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:53:48,180 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:53:48,182 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:53:48,182 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:53:48,183 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:53:48,184 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:53:48,185 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:53:48,187 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:53:48,189 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:53:48,198 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:53:48,200 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:53:48,200 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:53:48,201 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:53:48,207 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:53:48,207 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:53:48,207 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:53:48,208 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:53:48,209 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:53:48,209 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:53:48,211 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:53:48,212 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:53:48,212 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:53:48,213 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:53:48,214 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:53:48,214 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:53:48,214 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:53:48,219 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:53:48,220 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 19:53:48,236 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:53:48,236 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:53:48,237 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:53:48,237 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:53:48,238 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:53:48,238 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:53:48,238 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:53:48,238 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:53:48,239 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:53:48,239 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:53:48,239 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:53:48,239 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:53:48,239 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:53:48,240 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:53:48,240 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:53:48,240 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:53:48,240 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:53:48,240 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:53:48,240 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:53:48,243 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:53:48,243 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:53:48,291 INFO ]: Repository-Root is: /tmp [2018-06-22 19:53:48,304 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:53:48,310 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:53:48,312 INFO ]: Initializing SmtParser... [2018-06-22 19:53:48,312 INFO ]: SmtParser initialized [2018-06-22 19:53:48,313 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449_e7_353.smt2 [2018-06-22 19:53:48,314 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 19:53:48,401 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449_e7_353.smt2 unknown [2018-06-22 19:53:48,630 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449_e7_353.smt2 [2018-06-22 19:53:48,636 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:53:48,641 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:53:48,642 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:53:48,642 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:53:48,642 INFO ]: ChcToBoogie initialized [2018-06-22 19:53:48,648 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:53:48" (1/1) ... [2018-06-22 19:53:48,699 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:53:48 Unit [2018-06-22 19:53:48,699 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:53:48,700 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:53:48,700 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:53:48,700 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:53:48,722 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:53:48" (1/1) ... [2018-06-22 19:53:48,722 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:53:48" (1/1) ... [2018-06-22 19:53:48,732 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:53:48" (1/1) ... [2018-06-22 19:53:48,732 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:53:48" (1/1) ... [2018-06-22 19:53:48,743 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:53:48" (1/1) ... [2018-06-22 19:53:48,744 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:53:48" (1/1) ... [2018-06-22 19:53:48,745 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:53:48" (1/1) ... [2018-06-22 19:53:48,747 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:53:48,747 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:53:48,747 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:53:48,747 INFO ]: RCFGBuilder initialized [2018-06-22 19:53:48,748 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:53:48" (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 19:53:48,758 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:53:48,758 INFO ]: Found specification of procedure False [2018-06-22 19:53:48,758 INFO ]: Found implementation of procedure False [2018-06-22 19:53:48,758 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:53:48,758 INFO ]: Found specification of procedure state [2018-06-22 19:53:48,758 INFO ]: Found implementation of procedure state [2018-06-22 19:53:48,758 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:53:48,758 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:53:48,758 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 19:53:49,121 INFO ]: Using library mode [2018-06-22 19:53:49,121 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:53:49 BoogieIcfgContainer [2018-06-22 19:53:49,121 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:53:49,122 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:53:49,122 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:53:49,132 INFO ]: TraceAbstraction initialized [2018-06-22 19:53:49,132 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:53:48" (1/3) ... [2018-06-22 19:53:49,133 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bba5a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:53:49, skipping insertion in model container [2018-06-22 19:53:49,133 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:53:48" (2/3) ... [2018-06-22 19:53:49,133 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bba5a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:53:49, skipping insertion in model container [2018-06-22 19:53:49,133 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:53:49" (3/3) ... [2018-06-22 19:53:49,143 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:53:49,156 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:53:49,171 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:53:49,212 INFO ]: Using default assertion order modulation [2018-06-22 19:53:49,213 INFO ]: Interprodecural is true [2018-06-22 19:53:49,213 INFO ]: Hoare is false [2018-06-22 19:53:49,213 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:53:49,213 INFO ]: Backedges is TWOTRACK [2018-06-22 19:53:49,213 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:53:49,213 INFO ]: Difference is false [2018-06-22 19:53:49,213 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:53:49,213 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:53:49,224 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:53:49,234 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:53:49,234 INFO ]: Found error trace [2018-06-22 19:53:49,235 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:53:49,235 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:53:49,240 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 19:53:49,242 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:53:49,244 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:53:49,281 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:53:49,281 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:53:49,281 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:53:49,338 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:53:49,455 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:53:49,457 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:53:49,457 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:53:49,458 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:53:49,469 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:53:49,469 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:53:49,471 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:53:49,586 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:53:49,587 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:53:49,587 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:53:49,588 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:53:49,589 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:53:49,599 INFO ]: With dead ends: 13 [2018-06-22 19:53:49,599 INFO ]: Without dead ends: 13 [2018-06-22 19:53:49,601 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 19:53:49,620 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:53:49,657 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:53:49,659 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:53:49,661 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:53:49,662 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:53:49,662 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:53:49,662 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:53:49,662 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:53:49,662 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:53:49,663 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:53:49,664 INFO ]: Found error trace [2018-06-22 19:53:49,664 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:53:49,665 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:53:49,665 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 19:53:49,665 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:53:49,665 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:53:49,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:53:49,666 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:53:49,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:53:49,713 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:53:49,874 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:53:49,875 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:53:49,875 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 19:53:49,884 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:53:49,950 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:53:49,958 INFO ]: Computing forward predicates... [2018-06-22 19:53:50,219 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-06-22 19:53:50,299 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:53:50,320 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:53:50,320 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:53:50,320 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:53:50,320 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:53:50,321 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:53:50,321 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:53:50,614 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-06-22 19:53:50,757 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:53:50,757 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:53:50,757 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:53:50,757 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:53:50,758 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:53:50,758 INFO ]: With dead ends: 15 [2018-06-22 19:53:50,758 INFO ]: Without dead ends: 15 [2018-06-22 19:53:50,760 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-22 19:53:50,761 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:53:50,763 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:53:50,763 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:53:50,765 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:53:50,766 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:53:50,766 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:53:50,766 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:53:50,766 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:53:50,766 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:53:50,766 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:53:50,766 INFO ]: Found error trace [2018-06-22 19:53:50,766 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:53:50,767 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:53:50,768 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 19:53:50,768 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:53:50,769 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:53:50,769 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:53:50,769 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:53:50,769 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:53:50,883 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:53:51,498 WARN ]: Spent 414.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2018-06-22 19:53:51,651 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:53:51,652 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:53:51,652 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 19:53:51,662 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:53:51,710 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:53:51,710 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:53:51,714 INFO ]: Computing forward predicates... [2018-06-22 19:53:51,784 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 19:53:53,058 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 11 [2018-06-22 19:53:53,347 WARN ]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-06-22 19:53:53,520 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:53:53,543 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:53:53,543 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:53:53,543 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:53:53,543 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:53:53,543 INFO ]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:53:53,544 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:53:53,729 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2018-06-22 19:53:53,943 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:53:53,943 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:53:53,944 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:53:53,944 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:53:53,944 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:53:53,945 INFO ]: With dead ends: 17 [2018-06-22 19:53:53,945 INFO ]: Without dead ends: 17 [2018-06-22 19:53:53,945 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:53:53,945 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:53:53,948 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:53:53,948 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:53:53,948 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:53:53,949 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:53:53,949 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:53:53,949 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:53:53,949 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:53:53,949 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:53:53,949 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:53:53,949 INFO ]: Found error trace [2018-06-22 19:53:53,950 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:53:53,950 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:53:53,950 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 19:53:53,950 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:53:53,950 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:53:53,950 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:53:53,951 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:53:53,951 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:53:54,013 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:53:54,274 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2018-06-22 19:53:54,426 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:53:54,426 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:53:54,426 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) [2018-06-22 19:53:54,442 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:53:54,539 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:53:54,539 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:53:54,544 INFO ]: Computing forward predicates... [2018-06-22 19:53:55,306 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 23 [2018-06-22 19:53:55,752 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:53:55,773 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:53:55,773 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:53:55,773 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:53:55,773 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:53:55,773 INFO ]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:53:55,773 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:53:56,319 WARN ]: Spent 328.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2018-06-22 19:53:56,598 WARN ]: Spent 210.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 75 [2018-06-22 19:53:56,814 WARN ]: Spent 189.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 73 [2018-06-22 19:53:56,823 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:53:56,823 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:53:56,824 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:53:56,824 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:53:56,824 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:53:56,824 INFO ]: With dead ends: 13 [2018-06-22 19:53:56,824 INFO ]: Without dead ends: 0 [2018-06-22 19:53:56,824 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2018-06-22 19:53:56,824 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 19:53:56,824 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 19:53:56,825 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 19:53:56,825 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 19:53:56,825 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-22 19:53:56,825 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:53:56,825 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 19:53:56,825 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:53:56,825 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 19:53:56,825 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 19:53:56,830 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:53:56 BoogieIcfgContainer [2018-06-22 19:53:56,830 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 19:53:56,831 INFO ]: Toolchain (without parser) took 8194.72 ms. Allocated memory was 308.8 MB in the beginning and 422.1 MB in the end (delta: 113.2 MB). Free memory was 261.2 MB in the beginning and 345.7 MB in the end (delta: -84.5 MB). Peak memory consumption was 28.7 MB. Max. memory is 3.6 GB. [2018-06-22 19:53:56,834 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:53:56,835 INFO ]: ChcToBoogie took 57.54 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:53:56,835 INFO ]: Boogie Preprocessor took 47.34 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:53:56,836 INFO ]: RCFGBuilder took 374.21 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 246.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:53:56,836 INFO ]: TraceAbstraction took 7707.57 ms. Allocated memory was 308.8 MB in the beginning and 422.1 MB in the end (delta: 113.2 MB). Free memory was 245.2 MB in the beginning and 345.7 MB in the end (delta: -100.5 MB). Peak memory consumption was 12.7 MB. Max. memory is 3.6 GB. [2018-06-22 19:53:56,845 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 57.54 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 47.34 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 374.21 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 246.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 7707.57 ms. Allocated memory was 308.8 MB in the beginning and 422.1 MB in the end (delta: 113.2 MB). Free memory was 245.2 MB in the beginning and 345.7 MB in the end (delta: -100.5 MB). Peak memory consumption was 12.7 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. SAFE Result, 7.6s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 2.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 34 SDslu, 126 SDs, 0 SdLazy, 117 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 12800 SizeOfPredicates, 80 NumberOfNonLiveVariables, 717 ConjunctsInSsa, 100 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 20/68 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/speed2_e8_449_e7_353.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_19-53-56-858.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/speed2_e8_449_e7_353.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_19-53-56-858.csv Received shutdown request...